The average age of husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. The present age of the husband is

Answer: Option A

Explanation:

Number is (5*27) - (4*25) = 135-100 = 35

Answer: Option A

Explanation:

$$\begin{aligned} Average = \frac{3(1+2+3+4+5)}{5} = \frac{45}{5} = 9 \end{aligned}$$

Answer: Option B

Explanation:

As the month begin with sunday, so there will be five sundays in the month. So result will be:
$$\begin{aligned} = (\frac{510 \times 5 + 240 \times 25}{30}) = (\frac{8550}{30}) = 285 \end{aligned}$$

Answer: Option A

Answer: Option B

Explanation:

$$\begin{aligned} ( \frac {65+67+76+82+85}{5} ) = 75 \end{aligned}$$