An online store receives customer satisfaction ratings between `0` and `100`, inclusive. In the first `10` ratings the s

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Q 3003023848.     An online store receives customer satisfaction ratings between `0` and `100`, inclusive. In the first `10` ratings the store received, the average (arithmetic mean) of the ratings was `75`. What is the least value the store can receive for the `11^{th}` rating and still be able to have an average of at least `85` for the first `20` ratings?
A

`40`

B

`50`

C

`30`

D

`60`

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Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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