Question

Sam will take four science tests this quarter. Her scores on three of the tests are shown below

Test 1: 83%

Test 2: 91%

Test 3: 88%

Test 4: ?

What does Sam need to score on the fourth test to ensure that she will have an average of 90% for all four tests

Answer 1

(4*90) - (83+91+88) = 98%