Question

Mario makes 6 free throw shots out of his first 10 attempts. What is the least number of consecutive shots Mario must make to

increase his overall percentage from 60% to at least 70%?

1 shot

4 shots

10 shots

14 shots

Answer 1

B. 4 Shots

Explanation:

Mario makes 6 free throw shots out of his first 10 attempts. What is the least number of consecutive shots Mario must make to increase his overall percentage from 60% to at least 70%?

1 shot

4 shots

10 shots

14 shots

Answer 2

4 shots

Explanation:

Currently he makes: 6/10 = 60%

Letting x = additional free throws to make 70%, we can apply

(6 + x) / (10 + x) = 70%

Solving for x:

(6 + x) / (10 + x) = 7/10

cross multiply:

60 + 10x = 70 + 7x

3x = 10

x = 3 1/3

Since he can not make 1/3 of a shot, the least number of consecutive shots to get to 70% would be 4.