Question

a test was given to the two sections a and B of a class. The average score of 20 students of section A was 80% and average score of 30 students of section B was 10% less than the average of section A. what is the average percentage of the whole class​

Answer 1

Answer:

Total number of students in section A and B = 25 + 20 = 45

Average score of both the sections = 28

∴ Total score of both the sections = 28 x 45 = 1260

Total score of section A = 25 x 30 = 750

Let the average score of section B = x

Then, total score of section B = 20x

Given, 20x + 750 = 1260

⇒20x=510

⇒x=25.5

Answer 2

answer:

(C) 70 I hope you understand