He has a total score so far of 468.
After the seventh test he wants a total of 560.
560 - 468 = 92
After his six biology tests, Ruben has a mean score of 78. What Score does Ruben need on the next test to raise his average (mean) to 80?
2 answers
he needs to add 2 points to each of the 6 tests already taken
plus, he needs to score the 80 average
(2 * 6) + 80 = ?
plus, he needs to score the 80 average
(2 * 6) + 80 = ?
2 answers