Question
The average weight of 6 students in a group is 45 kg. If
one student is replaced by person 'B', the average weight of the group increases by 5%. Find the difference between the weight of the student who left and the weight of person 'B'.Solution
ATQ,
Total weight of the group = 45 × 6 = 270 kg
New average weight of the group = 45 × 1.05 = 47.25 kg
So, total weight of the group = 47.25 × 6 = 283.5 kg
So, difference between weights of the student who left and person 'B' =
283.5 - 270 = 13.5 kg
Alternate Solution—
Required difference = 0.05 × 45 × 6 = 13.5 kg
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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