After six biology tests, Ruben has a mean score of 74. What score does Ruben need on the next test to raise his average (mean) to 76?

88

Step-by-step explanation:

this question is a question that involves the use of the statistical principles of finding average

let the summation of the six scores of the biology test be represented as ∑x

∴ ∑x÷ 6=74

∑x=74 × 6

=444

444 is the summation of all the scores of all the six biology scores reuben had

the next test would be his 7th

let y represent the score for the 7th test

therefore, = 76

444 + y = (76 × 7)

444 + y = 532

y=88

Reuben needs to score 88 to raise his average to 76

1/5x+9 2/5y+7

step-by-step explanation: