Question
A 15-member group has two individuals aged 18 and 23.
When excluded, the average age of the rest increases by 3 years. Find the average age of all members.Solution
ATQ, Average age 'u' years. Total age 15u. Sum age 18+23=41. Remaining 15u−41. New average u+3. Equation: 15u−41=13(u+3) Solve: 15u−13u=41+39 ⇒80⇒2u=80 ⇒u=40
Statement:Â C < P > T = E < R; G > R > A < D
Conclusions:
I. T < G
II. G ≥ P
III. T > A
Statements: A < B = C < D, A > E = F ≥ G ≥ H > I
Conclusions:
I. D > I
II. E = I
Statements: J > K = L ≥ N > M > O ≥ P
Conclusions:
I. K ≥ O
II. J = N
III. P < NStatements:
J ≥ F = P; F > S ≥ A; S ≥ B < C
Conclusions:
I. C > A
II. B < J
Statements: E # L, L @ U, U $ N, N % K
Conclusions: I. K @ U II. K % U III. E @ U
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