Problema Solution
Jane would like an 86 average for the five math tests this semester. Her average on the first 4 tests so far is an 83. What grade must she earn on the fifth test to achieve an 86 average?
Answer provided by our tutors
An 86 average for 5 tests is 86 x 5 = 430 total score.
Her current average is 83 over 4 tests, 83 x 4 = 332
She has 1 test left to make up the difference of 430 and 332.
430 - 332 = 98 needed on her last test.