Question

The average of 10 persons in a committee is increased by 1 yr, when two women aged 45 and 40 years are substituted by two men. Find the average age of these two men.

a) 49.5

b) 47.5

c) 45

d) 45.5​

Answer 1

Option B. 47.5

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Step-by-step explanation:

Average =

P1+P2+..….P10

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10

✔A+1 ≈ P1+P2+-----------+P8+M1+M2

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10

⏩10A+10=(P1+P2_________+P8)+M1+M2

⏩M1+M2=10A+10 —10A+40+45

⏩M1+M2=95

Thus, the average age of these 2 men

95/2 = 47.5