Question

3) Given below are the marks obtained by students in
a class test; choose 10 - 25 as the first class interval.
12, 12, 15, 20, 35, 35, 46, 57, 68, 69, 70, 90, 90, 89, 78,
67, 56, 56, 57, 58, 57, 55, 54, 36, 79, 79, 89, 89, 90,44.
Answer the following questions.
(()) If the pass marks are 40, how many students
did not understand the lesson?
((ii) If a student gets a prize on obtaining 85% or
more marks, how many students qualify for
the prize?​

Answer 1

Answer:

Step-by-step explanation:

class intervals     frequency

10 - 25                      4

25 - 40                      3

40 - 55                      3

55 - 70                      10

70 - 85                     4

85 - 100                   6

1. 7 students

2. 6 students