liz has scores of 87,75.82and 93 he wants to raise the mean to 87

Mathematics
Tutor: None Selected Time limit: 1 Day

i need help

Apr 28th, 2015

The present mean = (87+75+82+93)/4 = sum/4 = 84.25

to raise to 87 we need to add x such that (sum + x)/5=87

thus (337+x)/5= 87 or 337+x=435=> x=98

Apr 28th, 2015

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Apr 28th, 2015
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