General Questions

Answer: Option A

Explanation:

Present age of (A + B)
= (18 x 2 + 3 x 2) years
= 42 years.

Present age of (A + B + C)
= (22 x 3) years = 66 years.

C's age = (66 - 42) years = 24 years.

Answer: Option B

Explanation:

Sum of the present ages of husband, wife and child
  = (27 x 3 + 3 x 3) years = 90 years.

Sum of the present ages of wife and child
 = (20 x 2 + 5 x 2) years = 50 years.

Husband's present age = (90 - 50) years = 40 years.

Answer: Option C

Explanation:

Total age of 5 members, 3 years ago
          = (17 x 5) years = 85 years.

Total age of 5 members now = (85 + 3 x 5) years
                                          = 100 years

Total age of 6 members now = (17 x 6) years
                                          = 102 years.

 Age of the baby = (102 - 100) years = 2 years.

Answer: Option D

Explanation:

Middle number
=[(10.5 x 6 + 11.4 x 6) - 10.9 x 11]
= (131.4 - 119.9)
= 11.5

Answer: Option D

Explanation:

Total weight of (A + B + C) = (163/3 x 3) kg
= 163 kg.

Total weight of (B + D + E) = (53 x 3) kg
= 159 kg.

Adding both, we get : A + 2B + C + D + E
= (163 + 159) kg = 322 kg.

So, to find the average weight of A, B, C, D and E, we ought to know B's weight, which is not given.

So, the data is inadequate.