SSC GD Constable 2021 · Question 256 of 377

If the average of 23, 26, y , y + 4 and y + 7 is 30, then the value of y is:

average

A35
B30Correct
C32
D25

Answer: B. 30

Explanation

Given: T he average of 23, 26, y , y + 4 and y + 7 is 30. Concept used: Total = Average × Number of entities Calculation: There are 5 numbers mention in the question. According to the question, (23 + 26 + y + y + 4 + y + 7) = 30 × 5 ⇒ 3y + 60 = 150 ⇒ 3y = 150 - 60 ⇒ y = 90/3 ⇒ y = 30 ∴ The value of y is 30.

Source: SSC GD Constable 2021 Prev. Year Paper (2021-11-29 Shift 1) English — Prepp (with solutions) · reliable-secondary

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