Question

The mean score on a set of 23 tests is 78. Suppose two more students take the test and score 70 and 56. What is the new​ mean?

​(Round to the nearest ​tenth.)

Answer 1

76.8

Explanation:

total score of 23 tests=23×78=1794

now total of 25 tests=1794+70+56=1920

new mean=1920/25=76.80=76.8