Question

For the following distribution the frequency of the class 70-80 is

Answer 1

Answer:

78 is the correct answer

Answer 2

Answer:

10

Step-by-step explanation:

The cumulative frequency is calculated by adding each frequency from a frequency distribution table to the sum of its predecessors.

Frequencies are :-

• More than 90 = 5
• More than 80 = 20 - 5 = 15
• More than 70 = 30 - 20 = 10
• More than 60 = 48 - 30 = 18
• More than 50 = 60 - 48 = 12

Therefore , the frequency of the class 70-80 is

10 .