How do you calculate age ratio?

Find the ratio of their present ages. 10 years ago, age of mother was three times the age of her son. Say, the age of son was x and mother’s age was 3x. After ten years: Mother’s age will be (3x + 10) +10 and son’s age will be (x + 10) + 10.

How do you solve age difference questions?

If the present age is y, then n times the present age = ny. If the present age is x, then age n years later/hence = x + n. If the present age is x, then age n years ago = x – n. The ages in a ratio a: b will be ax and bx.

When the present age of the mother is added to the present age of the daughter the sum is 40 years what will be their total age after 5 years?

Now, we are given that the mother’s age will be twice her daughter’s age. Hence, the present age of the mother is 40 years and the present age of the daughter is 10 years.

When the present age of mother is added to the present age of daughter?

When the present age of mother is added to the present age of daughter, the total is 40 years.

How do you calculate a ratio example?

Ratios compare two numbers, usually by dividing them. If you are comparing one data point (A) to another data point (B), your formula would be A/B. This means you are dividing information A by information B. For example, if A is five and B is 10, your ratio will be 5/10.

How do you use dependency ratio in a sentence?

The increasing population growth raises the dependency ratio and puts pressure on education, health system, and food supply. All nine parties agreed that the dependency ratio of people currently in and those outside of the labour force is weakening, which means steep challenges for society at large.

How do you calculate dependency ratio in economics?

The formula for the dependency ratio is – (the number of people aged between 0 and 14 + the number of people aged 65 and above) divide by the total population between 15 and 64, times by 100.

What is the ratio of their ages in ten years?

The ratio of their ages in ten years: So the answer to the problem is: 2/3. A one-variable solution. This is harder at the start because writing all four expressions with one variable can be tricky. But later it is easier because we will only need to write and solve one equation.

What is the ratio between the ages of Sam and John?

The ages of Sam and John are in the ratio 5:7. After 9 years this ratio will become 4:5. What is the difference between their ages? Let x and y be the ages of the two persons.

What is the ratio of present age of mother and son?

Example 4: Ten years ago, the age of a person’s mother was three times the age of her son. Ten years hence, the mother’s age will be two times the age of her son. The ratio of their present ages will be: A) 10:19 B) 9: 5 C) 7: 4 D) 7: 3 Answer: Let the age of the son ten years ago be equal to x years.

What is the ratio of the age of the sister?

Let x denote the age of the brother and y denote the age of the sister. The as per the question, the ratio is x/y = 4/5. upon cross- multiplication, we have: 5x = 4y or in other words y > x. Thus the sister is the elder one. Example 2: The ratio of the age of a person A and another person B is 1:3.