Three years ago, the average age of M and N was 18 years. With P joining them, the average age becomes 22 years, How old is P now?

24 years

27 years

28 years

30 years

Present age of (M + N) = (18 x 2 + 3 x 2) years = 42 years. Present age of (M + N + P) = (22 x 3) years = 66 years. P's age = (66 - 42) years = 24 years.

how can we know dat p had joined 3 years after...y nt p had joined 3 years before

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