Question

Jenny has five exam scores of 62, 58, 77, 61, and 65 in her biology class. What score does she need on the final exam to have a mean grade of 70

Answer 1

The total of Jenny's 5 tests = 375

If she wants an average of 77 then

her 6 tests must total 6 x 77 = 462

462 - 375 = 87 which is what Jenny

must score on the sixth test for an

average of 77.