Question

Janice scored 73 on her first four tests of the term. What would she have to score on the fifth test to have an average of 75 on the five tests?

Answer 1

let she scored x in 5th test
therefore (73*4 + x)/5 = 75
now solve accordingly :)

Answer 2

Let, she scored y marks on fifth test
According to the question,
{(73x4)+y}/5=75
=>292+y=375
=>y=83
She have to score 83 marks.