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Question:

Jenny’s test grades are 93, 89, 96, and 98. If she wishes to raise her average to 95, what does she need to score on her next test?

A
99

Explaination

To determine Jenny’s average, add the test scores and divide the sum by the number of tests taken. You want to know what she would need to make on the next test in order to achieve an average of 95. The formula can be set up as (93 + 89 + 96 + 98 + x) ÷ 5 = 95. Combining the like terms results in (376 + x) ÷ 5 = 95. Multiplying both sides by 5 results in 376 + x = 475. So, x = 99.