Question

Average age of man and his son is 35 years .The ratio of their ages is 5:2 respectivey .What is the son's age?

Answer 1

total age is =2×35=70 years

now ,,, the of the man

$= 70 \times \frac{5}{5 + 2} \\ = 70 \times \frac{5}{7} \\ = 50 \: \: years$

and the age of his son...

$= 70 \times \frac{2}{7} \\ = 20 \: \: years$

Answer 2

Answer:

The son is 20.

Step-by-step explanation:

It says the average of their ages is 35, and since there are only two of them, you can multiply the 35 by 2 to give you the addition of their ages.

(Average means dividing the sum of the values in the set by their number)

35 * 2 = 70.

Now we know that the sum of the ages is 70.

Add the number of the ratios together (5 and 2) and we get seven. meaning the 2/7 * 70 should give the son's age.

Therefore the answer is 20.