Question

Billy's mean after three tests is 84, In two of these tests, the got 75 and 84 respectively. Calculate the score he got in his 3rd test.

Answer 1

Answer:

here is your answer please mark it the brainliest

Step-by-step explanation:

mean=84

test 1=75

test 2=84

test 3=???

mean=(test 1+ test 2+test 3)/3

84=(75+84+test 3)/3

84*3=159+test 3

252=159+test 3

252-159=test 3

93=test 3

therefore he got 93 in test 3

hope you got your answer plzzz mark this answer as brainliest

Answer 2

Answer:

93 marks

Step-by-step explanation:

Mean of a quantity = sum of all data figures / number of  data figures.

So, let's keep the third data figure as n

WKT

84 + 75 + n / 3 = 84

159 + n = 84 x 3

159 + n = 252

n = 93

Therefore, Billy got 93 marks in the third test.