In a class, the average score is 75. If the average score of the boys is 70 and that of the girls is 80, what is the ratio of boys to girls?
Q1. In a class, the average score is 75. If the average score of the boys is 70 and that of the girls is 80, what is the ratio of boys to girls?
Answer: 1 : 1
Explanation: Let's denote the number of boys as 'b' and girls as 'g'. The total score equation gives 70b + 80g = 75(b + g). Simplifying, we get b = g, so the ratio is 1:1.