Question

Arya secured 73, 86, 78 and 75 marks in 4 tests. What is the least number of marks she can secure in her next test, if she must have a mean score of 80 marks in 5 tests?

Answer 1

Answer:

88 marks

Step-by-step explanation:

We know that Mean = Sum/Total.

Given, Mean of 5 tests = 80.

Then, Sum = 5 * 80

                  = 400.

Then,

Sum of marks in her 4 tests = 73 + 86 + 78 + 75

                                              = 312.

Hence, Least number of marks = 400 - 312

                                                    = 88.

Hope it helps!