Question

in a school 55% of the pupils are boys. the ratio of those with black, brown and blonde hair is 4:4:2. what percentage of the pupils are boys that do not have blonde hair?

Answer 1

By applying the ratio of hair color among boys and calculating 80% of the 55% of pupils who are boys, we find that 44% of the pupils are boys that do not have blonde hair.

Step-by-step explanation:

To find out what percentage of the pupils are boys that do not have blonde hair, we need to use the given information: 55% of the pupils are boys and the ratio of boys with black, brown, and blonde hair is 4:4:2 respectively. Since the ratio adds up to 10 parts, boys with black or brown hair make up 8 out of 10 of the boys. Therefore, 80% of the boys have black or brown hair.

The next step is to calculate 80% of the 55% of pupils who are boys. This is done by multiplying 0.8 by 55%:

0.8 × 55% = 44%

So, 44% of the pupils are boys who do not have blonde hair.