Question

Average age of 6 boys is 12 years. The average age of 4 other boys is 18 years. Find the

average age of all 10 boys.​

Answer 1

Average age of 6 boys = 12 years

so, total age of 6 boys = 12 × 6 = 72 years

Average age of 4 boys = 18 years

so, total age of 4 boys = 72 years

Total age of 10 boys = 72 + 72 = 144

So, average age of 10 boys = 14.4 years

Answer 2

Answer:

The average age of 10 boys = 14.4 years.

Step-by-step explanation:

Given:

Average of 6 boys = 12 years

The average age of 4 other boys is 18 years.

To find:

The average age of all 10 boys.​

Step 1

Average = Sum of age/ number of boys

The age of one boy = average age × number of boy

so, total age of 6 boys = 12 × 6 = 72 years

Step 2

The average age of 4 boys =18 years

Total year = 18×4 = 72 years

The average age of 10 boys = (72+72)/10

The average age of 10 boys = 14.4 years

Therefore, the average age of 10 boys = 14.4 years.

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