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Mathematics, 04.01.2021 03:40 mslamaya11

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 11th rating and still be able to
have an average of at least 85 for the first 20 ratings?

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