Question

The average age of 10 girls is 20 years and the average age of 15 boys is a years. If the average age years of all the boys and girls is 23 years, find the value of (a) .​

Answer 1

Answer:

3 is = {a} this is the best way to get the answers

Answer 2

Answer:

25 years

Step-by-step explanation:

The average age of 10 girls is 20 years

Total age of girls = 20 * 10

the average age of 15 boys is a years

Total age of boys = 15 a

Average = Total value / no of girls

$average \: = \frac{20 \times 10 + 15 \times a}{10 + 15} = 23$

On solving we get

a = 25 years