Thirty girls and boys have planned a picnic. There is a ratio of 3 girls to 7 boys. How many boys are there?

Question

taskmasters · Answer

To solve the given problem 
 We can consider, 
 30% are girls of 30 people 
 70% are boys in 30 people 
 In order to get the number, we just multiply the total number of people with the percentage of the designated target populace. 
 1. 30 x 0.3 = 9 girls 
 2. 30 x 0.7 = 21 boys 
 3. 21 boys + 9 girls = 30 people 
 **Hence, there are 21 boys. 
 **

taskmasters · Answer

In the group of 30 people, there are 21 boys based on the ratio of 3 girls to 7 boys. The ratio is calculated by dividing the total number of people by the total ratio parts, which equals 3. Each part is then multiplied by the number of parts designated for boys to find the total number of boys. 
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Thirty girls and boys have planned a picnic. There is a ratio of 3 girls to 7 boys. How many boys are there?

Answer (2)

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