CBSE Class 9 Mathematics Probability Set A

Read and download free pdf of CBSE Class 9 Mathematics Probability Set A. Get printable school Assignments for Class 9 Mathematics. Class 9 students should practise questions and answers given here for Chapter 15 Probability Mathematics in Class 9 which will help them to strengthen their understanding of all important topics. Students should also download free pdf of Printable Worksheets for Class 9 Mathematics prepared as per the latest books and syllabus issued by NCERT, CBSE, KVS and do problems daily to score better marks in tests and examinations

Assignment for Class 9 Mathematics Chapter 15 Probability

Class 9 Mathematics students should refer to the following printable assignment in Pdf for Chapter 15 Probability in Class 9. This test paper with questions and answers for Class 9 Mathematics will be very useful for exams and help you to score good marks

Chapter 15 Probability Class 9 Mathematics Assignment

Question : 1500 families with 2 children were selected randomly, and the following data were recorded:
CBSE Class 9 Mathematics Probability Set A

Compute the probability of a family, chosen at random, having
(i) 2 girls (ii) 1 girl (iii) No girl

Also check whether the sum of these probabilities is 1.
Answer:

Total number of families = 475 + 814 + 211
= 1500

CBSE Class 9 Mathematics Probability Set A-

 

Question : Three coins are tossed simultaneously 200 times with the following frequencies of different outcomes:
CBSE Class 9 Mathematics Probability Set A-1

If the three coins are simultaneously tossed again, compute the probability of 2 heads coming up.
Answer:

Number of times 2 heads come up = 72
Total number of times the coins were tossed = 200

CBSE Class 9 Mathematics Probability Set A


Question : A teacher wanted to analyse the performance of two sections of students in a mathematics test of 100 marks. Looking at their performances, she found that a few students got under 20 marks and a few got 70 marks or above. So she decided to group them into intervals of varying sizes as follows: 0 − 20, 20 − 30… 60 − 70, 70 − 100. Then she formed the following table:

CBSE Class 9 Mathematics Probability Set A-2
(i) Find the probability that a student obtained less than 20 % in the mathematics test.
(ii) Find the probability that a student obtained marks 60 or above.
Answer:

Total number of students = 90
(i) Number of students getting less than 20 % marks in the test = 7
Hence, required P = 7/90  probability,

(ii) Number of students P = 23/90 obtaining marks 60 or above = 15 + 8 = 23 
Hence, required probability,

Question : 

Concentration of SO2 (in ppm) Number of days (frequency )
0.00 − 0.04 4
0.04 − 0.08 9
0.08 − 0.12 9
0.12 − 0.16 2
0.16 − 0.20 4

0.20 − 0.24

2
Total 30

The above frequency distribution table represents the concentration of sulphur dioxide in the air in parts per million of a certain city for 30 days. Using this table, find the probability of the concentration of sulphur dioxide in the interval 0.12 − 0.16 on any of these days.
Answer:

Number days for which the concentration of sulphur dioxide was in the interval of
0.12 − 0.16 = 2
Total number of days = 30
Hence, required probability, P = 2/30 =1/15

Probability


Q 1 Tom draws a marble from a bag containing 12 marbles.There are 3 red marbles, 4 blue marbles and 5 green marbles, find the probability that he will draw a blue marble.

Q 2 A basket has 5 apples, 10 oranges and 5 bananas. Find the probability of getting out an apple.

Q 3 One card is drawn from a well-shuffled deck of 52 cards then find the probability that the card will be a king.

Q 4 Mr. And Mrs. X stays in a house along with their seven children. The female to male ratio in the family is 1:2. Find the probability that all the children are either boy or girl.

Q 5 The record of a weather station shows that out of the past 200 consecutives days, its weather forecasts were correct 150 times then find the probability that on a given day it was correct .

Q 6 The record of a weather station shows that out of the past 200 consecutives days, its weather forecasts were correct 150 times then find the probability that on a given day it was not correct.

Q 7 A drawer contains 8 red socks, 3 white socks and 5 blue socks. Without looking, Mayank draws out a pair of socks. Find the probability that the pair of socks is white.

Q 8 Two coins are tossed simultaneously 100 times and we get the following outcomes:(i) One head = 20 (ii) Two heads = 50. Find the probability that there is no head.

Q 9 Two coins are tossed simultaneously 100 times and we get the following outcomes:(i) No head = 30 (ii) Two heads = 50. Find the probability that there is only one head.

Q 10 Two coins are tossed simultaneously 100 times and we get the following outcomes:(i) No head = 30 (ii) One head = 20. Find the probability of getting two heads.

Q 11 A coin is tossed 23 times and observed that 10 times head comes up. Find the probability that a tail comes up.

Q 12 A coin is tossed 100 times. It is observed that 60 times head comes up and 40 times tail comes up then find the probability that neither a head nor a tail comes up.

 

Click on link below to download CBSE Class 9 Mathematics Probability Set A

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CBSE Class 9 Mathematics Chapter 15 Probability Assignment

We hope you liked the above assignment for Chapter 15 Probability which has been designed as per the latest syllabus for Class 9 Mathematics released by CBSE. Students of Class 9 should download and practice the above Assignments for Class 9 Mathematics regularly. We have provided all types of questions like MCQs, short answer questions, objective questions and long answer questions in the Class 9 Mathematics practice sheet in Pdf. All questions have been designed for Mathematics by looking into the pattern of problems asked in previous year examinations. 

Assignment for Mathematics CBSE Class 9 Chapter 15 Probability

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Chapter 15 Probability Assignment Mathematics CBSE Class 9

All questions and their answers for the assignment given above for Class 9 Mathematics have been developed as per the latest curriculum and books issued for the current academic year. The students of Class 9 can rest assured that the best teachers have designed the questions of Mathematics so that you are able to revise the entire syllabus if you do the assignments. Lot of MCQ questions for Class 9 Mathematics have also been given in the worksheets and assignments for regular use. All study material for Class 9 Mathematics students have been given on studiestoday.

Chapter 15 Probability Assignment CBSE Class 9 Mathematics

Regular assignment practice helps to get a more comprehensive understanding of Chapter 15 Probability concepts. Assignments play a crucial role in understanding Chapter 15 Probability in CBSE Class 9. Students can download all the assignments of the same chapter in Class 9 Mathematics in Pdf format. You can print them or read them online on your computer or mobile.

CBSE Mathematics Class 9 Chapter 15 Probability Assignment

CBSE Class 9 Mathematics latest books have been used for coming up with the latest questions and solutions for the above assignment. If you have revised all concepts relating to Chapter 15 Probability then you should attempt all questions given in the test sheets above. We have also provided lot of Worksheets for Class 9 Mathematics which you can use to further make your self stronger in Mathematics

Where can I download in PDF assignments for CBSE Class 9 Mathematics Chapter 15 Probability

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The assignments for Chapter 15 Probability Class 9 Mathematics for have been made based on which syllabus

The Chapter 15 Probability Class 9 Mathematics Assignments have been designed based on latest CBSE syllabus for Class 9 Mathematics issued for the current academic year

Can I download and print these printable assignments for Mathematics Chapter 15 Probability Class 9

Yes, These printable assignments for Chapter 15 Probability Class 9 Mathematics are free to download and print

How many topics are covered in Chapter 15 Probability Mathematics assignments for Class 9

All topics given in Chapter 15 Probability Mathematics Class 9 Book for the current academic year have been covered in the given assignment

Is there any charge for this assignment for Chapter 15 Probability Mathematics Class 9

No, all Printable Assignments for Chapter 15 Probability Class 9 Mathematics have been given for free and can be downloaded in Pdf format

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Are these assignments available for all chapters in Class 9 Mathematics

Yes, apart from Mathematics you can download free assignments for all subjects in Class 9

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