Question

Mary has scored 99, 83, 74, and 69 on her previous four tests. What score does she need on her next test so that her average
(mean) is 77?

Answer 1

Answer:

66

Step-by-step explanation:

mean = the sum of the value / the number of the value

when we calculate the some must be 385 so the sum of the given value gives 319 so to reach the average 77 she must score 66