Question

Nisha secured 73, 86, 78, 75 in four tests. What is the least number of marks she should secure in her next test if she has to have an average of 80.

Answer 1

Let the mark required in next test be x.

(73+86+78+75+x)÷5=80

(312+x)÷5=80

312+x=80×5

312+x=400

x=400-312

x=88

Least number of mark is 88 marks.

Answer 2

Answer:

8

let the mark required in next test be X

73+86+78+75+x÷5=80

x=88

least number of Mark is 88 marks