Question

45)The combined mean score of two sections is 28. The
mean score of section A is 30, in which there are 25
students. If there are 20 students in section B, the mean
score of section B is :​

Answer 1

Explanation:

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

Hope it helps ✔️✌️❤️

Answer 2

Answer:

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