Question

Ivan had scores of 82, 73 and 64 on three of four tests. If his average on all four tests was 75, his score on the fourth test was

Answer 1

81

Explanation:

The average is simply a name for mean, which we find by dividing the sum of all the numbers by the total number of numbers.

There are four tests and thus four numbers in this scenario, so we have:

`((82+73+64+x))/(4)=75\\219+x=300\\x=81`