Question

7. The average of six members is 30. If the
average of first-four is 25 and that of last
three is 35, then the fourth number is
(a) 25 (b) 30 (c) 35 (d) 40​

Answer 1

The fourth number is : 25.

I'll give you the answer in short hope you can understand it,

25×4 + 35×3 - 30×6 = 25

Answer 2

Explanation:

option A - 25

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