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

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^

answer: t=3

step-by-step explanation: