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What is the number of books Regina must sell on day 5 to have a mean of 90 books sold? A- 89B- 90C- 94D- 98
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What is the number of books Regina must sell on day 5 to have a mean of 90 books sold? A- 89B- 90C- 94D- 98

What is the number of books Regina must sell on day 5 to have a mean of 90 books sold-example-1
User Shankar Thyagarajan
by
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1 Answer

5 votes

Mean = sum of books sold / number of days

90 = (87+94+91+84+x ) /5

90 = (356+x) /5

90 * 5 = 356+x

450 = 356+x

450-356 = x

x = 94

Option C

User Jun Drie
by
3.6k points
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