Question

76, 85, 82, 75, 74 kia's math test scores are shown. in order to join the math club she must have at least an 80 test score. what is the minimum score that she must make on her next test to have an average of 80?

a. 83
b. 88
c. 90
d. 92

Answer 1

The answer is 88 because 76+85+82+75+74+88=480/6 which is an average of 80.

Answer 2

88 is the minimum score that she must make on her next test to have an average of 80.

Option b is correct.

Explanation:

Let the test score required be x.

Kia's math test scores = 76, 85, 82, 75, 74, x

Average of the marks ≥ 80

Average =
`\frac{\text{Sum of all terms}}{\text{Number of terms}}`

`80\leq( 76+ 85+ 82+ 75+74+x)/(6)=(392 +x)/(6)`

x ≥ 88

Therefore, 88 is the minimum score that she must make on her next test to have an average of 80.