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In a party there were 8 men, when 2 of these men aged 20 and 24 left the party and 2 women entered the party, the average age of the entire group of 8 increased by 2. What was the average age of the two new women entered the party?

A.	35	B.	32
C.	30	D.	33

Answer and Explanation

Answer:30

Explanation:
Average age of X1 = ∑X_men / 8 (1)
= ∑X_men = 8X1
Let ages of two women be A, B
∑X _new = ∑X _men â€“ (20 +24) + (A + B)
X1 + 2 = (= ∑X _men â€“ 44 + (A + B)) / 8
Equations (1) and (2) gives:
44/8 â€“ (A + B)/8 = -2
44 â€“ (A +B) = -16
A + B = 60
Average age of women = 60/2 = 30 years

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