37.
CASE BASED STUDY QUESTION ( Ques No 36 - 39 )
A Mathematics teacher asks students to collect the marks of Mathematics in Half
yearly exam. She instructed to all the students to prepare frequency disctribution table
using the data collected. Ram collected the following marks (out of 50) obtained in
Mathematics by 60 students of Class IX
21, 10, 30, 22, 33, 5, 37, 12, 25, 42, 15, 39, 26, 32, 18, 27, 28, 19, 29, 35, 31, 24, 36, 18, 20, 38, 22, 44, 16, 24, 10, 27, 39, 28, 49, 29, 32, 23, 31, 21,
34, 22, 23, 36, 24, 36, 33, 47, 48, 50, 39, 20, 7, 16, 36, 45, 47, 30, 22, 17.
Ques. No. 37
How many students scored less
than 20 marks?
Answers
Given : A Mathematics teacher asks students to collect the marks of Mathematics in Half yearly exam.
Marks of 60 seconds
21, 10, 30, 22, 33, 5, 37, 12, 25, 42, 15, 39, 26, 32, 18, 27, 28, 19, 29, 35, 31, 24, 36, 18, 20, 38, 22, 44, 16, 24, 10, 27, 39, 28, 49, 29, 32, 23, 31, 21,
34, 22, 23, 36, 24, 36, 33, 47, 48, 50, 39, 20, 7, 16, 36, 45, 47, 30, 22, 17.
To Find : students scored less than 20 marks
Solution:
Total Students = 60
scores less than 20 marks
10, 5, 12, 15, 18, 19, 18, 16, 10, 7, 16, , 17
Number of students = 12
12 students scored less than 20 marks
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