Among the fifty children at the book fair, \( b \) of them are boys. 30% of the girls at the book fair are younger than 12 years old, while 40% of the boys are at least 12 years old. How many children at the book fair are younger than 12 years old?

girls= g boys=b 50=g+b Now we know that 30% of the girls are younger than 12. That's already half to answer... We also know that 40% of the boys are OLDER than 12, which leaves 60% of the boys YOUNGER than 12. This makes us know that 30%+60% out of 50 kids are younger than 12 30%+60%=90%
90% of the kids are younger than 12 90% of 50 is 45
ANSWER: 45 kids are younger than 12

Answered by Cpow | 2024-06-10

To find the number of children younger than 12 at the book fair, subtract the number of boys older than 12 from the total number of children. ;

Answered by Burger1123 | 2024-06-18

To find the number of children younger than 12 at the book fair, we first express the number of girls and boys in terms of their percentages. The total number of children younger than 12 can be calculated as 15 + 0.3 b , where b is the number of boys.
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Answered by Burger1123 | 2025-01-04