SSC CGL Tier 2 :: Quantitative Ability SSC QA Test 1

Quantitative Ability » SSC QA Test 1 » General Questions - Discussion

1 .

The average weight of 3 men A, B and C is 84 kg. Another man D joins the group and the average now becomes 80 kg. If another man E whose weight is 3 kg more than that of D, replaces A, then the average weight of B, C, D and E becomes 79 kg. Then weight of A is :

[ A ]    72 kg
[ B ]    74 kg
[ C ]    75 kg right
[ D ]    76 kg
Answer : Option C
Explanation :

Total weight of A, B and C = 84 × 3 = 252 kg.
Total weight of A, B, C and D = 80 × 4 = 320 kg.
So, weight of D = 320 – 252 = 68 kg.
ATQ, weight of E = 68 + 3 = 71 kg.
Total weight of B, C, D and E = 79 × 4 = 316 kg.
So, weight of A = 320 – 316 + 71
= 75 kg
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