Question

45. The average age of a woman and her
daughter is 25 yr. The ratio of their ages is
7:3, respectively. What will be the ratio of
their ages after 9 yr?
(a) 2:1 (b) 5:2 (c) 4:1 (d) 11:6​

Answer 1

As We know that the average age of a woman and her daughter is 25 yr.

♣ Ave. age of two Person = 2 × Av. age

♣ 2 × 25 = 50 years

Let the age of woman and daughter be 7x and 3x Respectively.

→ 7x + 3x = 50

→ 10x = 50

→ x = 50/10

→ x = 5

• Woman's age = 35 years
• Daughter's age = 15 years

Ratio of their ages after 9 years will be,

→ (35 + 9)/(15 + 9)

→ 44/24

→ 11/6

→ 11:6

Hence,

The Ratio of their ages after 9 yr will be 11:6.

Answer 2

Answer:

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