Question 1192223
he had 4 tests in total.
the final was a 79.
the final counts 3 times as much as each of the other 3 tests.
each of the other tests has a frequency of 1.
the final has a frequency of 3.
the weighted total will be 85 + 76 + 82 + 3 * 79 = 480.
the total weights will be 6.
the weighted average will be 480 / 6 = 80.