The mean of Fred’s grades on five tests was 75.2. The grades on the first 4 of these tests were 87, 84, 88, and 45. Find the gra
de on his fifth test.
2 answers:
Answer:
72
Step-by-step explanation:
mean x number of total test scores -> 75.2 x 5=376
sum of the four test scores given -> 304
difference of the two numbers -> 376- 304= 72
the missing test score, therefore the answer is 72.
88+87+84+45 = 304
304+x/5=75.2
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