CBSE Class 9 Mathematics Frequency Distribution Assignment Set 01

Choose the Correct choice out of 4 Choices

Given the following table:

Choose the correct answer, by considering the above table, from the following:

Question. class size is
(a) 10
(b) 9.5
(c) 9
(d) 8.5
Answer: (a) 10

Question. True upper limit of 11–20 is
(a) 11
(b) 20.5
(c) 20
(d) 11.5
Answer: (b) 20.5

Question. class mark of 31–40 is
(a) 9
(b) 4.5
(c) 35.5
(d) 25.5
Answer: (c) 35.5

Question. The distribution given in the table is
(a) exclusive
(b) Inclusive
(c) limiting
(d) None of the options
Answer: (b) Inclusive

Question. Cumulative frequency of the 4th class is
(a) 12
(b) 24
(c) 30
(d) 34
Answer: (c) 30

Question. The adjustment factor of the given distribution is
(a) 0.5
(b) 1
(c) 1.5
(d) 2
Answer: (a) 0.5

Question. In an examination, seven students scored the following marks in Mathematics
62, 59, 70, 49, 65, 72, 98.
The range of marks is
(a) 52
(b) 51
(c) 50
(d) 49
Answer: (d) 49

Question. To find the mid value of a class (say \( x - y \)), the formula is
(a) \( \frac{x+y}{2} \)
(b) \( \frac{x-y}{2} \)
(c) \( \frac{x^2-y^2}{2} \)
(d) \( \frac{xy}{2} \)
Answer: (a) \( \frac{x+y}{2} \)

Question. The class marks of a distribution are
26, 31, 36, 41, 46, 51, 56, 61, 66
Its class size is
(a) 6
(b) 5
(c) 2.5
(d) 3
Answer: (b) 5

Question. True class limits of Q No. 9 of 41 is
(a) 38.5–43.5
(b) 39–43
(c) 40–42
(d) 38–44
Answer: (a) 38.5–43.5