The answer is 3 because z to the y a-1
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That would be 4/6, or 2/3 simplified. As a percent, that would be 66%.
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Ok so the average is 50
average of x number of things is
(add value of all things)/x=average
4 test scores needed
so divide by 4
3 test scores ar known
average is 50
x= missing score
(43+48+42+x)/4=50
times 4 both sides
133+x=200
minus 133 both sides
x=67
a score of 67 is needed
