What would Henry need to score on his fifth test to have an average of 86 if he had the following World History scores: 88, 76, 97, 84?
1 Answer
Nov 4, 2014
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#(X+88+76+97+84)/5=86# -
#(X+345)/5=86# -
#(X+345)/5*5=86*5# -
#X+345-345=430-345# -
#X=85#
Checking:
