# NCERT Mathematics Class 9 Exemplar Ch 14 Statistics and Probability Part 8 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Exercise 14.3

Q. 1. The blood groups of 30 students are recorded as follows: A, B, O, A, AB, O, A, O, B, A, O, B, A, AB, B, A, AB, B, A, A, O, A, AB, B, A, O, B, A, B, A Prepare a frequency distribution table for the data.

 Blood Group Number of Students (frequency) A 12 B 8 AB 4 O 6 Total 30

Q. 2. The value of π upto 35 decimal places is given below: Make a frequency distribution of the digits 0 to 9 after the decimal point.

 Digit 0 1 2 3 4 5 6 7 8 9 Frequency 1 2 5 6 3 4 3 2 5 4

Q. 3. The scores (out of 100) obtained by 33 students in a mathematics test are as follows:

Represent this data in the form of a frequency distribution.

 Scores 48 58 64 66 69 71 73 81 83 84 Frequency 3 3 4 7 6 3 2 1 2 2

Q. 4. Prepare a continuous grouped frequency distribution from the following data:

 Mid-point Frequency 5 4 15 8 25 13 35 12 45 6