Question

In a class of 30 pupils, the ratio of the number of boys to the number of girls is 2:3. How many boys should be added to the class to make an equal numbers of boys and girls?

Answers

GPT 3.5
The total ratio of the number of boys to girls is 2+3 = <<2+3=5>>5
If there are 30 pupils in the class, then each part of the ratio represents 30/5 = <<30/5=6>>6 pupils.
There are currently 6*2 = <<6*2=12>>12 boys in the class.
To have an equal number of boys and girls, 12 boys should be added. Answer: \boxed{12}.