Query: Rob’s marks in 5 tests were 60%, 55%, 45%, 40% and 50%. What mark must he get in the last test to gain an overall mean of 55%?
Response:
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Query: Rob’s marks in 5 tests were 60%, 55%, 45%, 40% and 50%. What mark must he get in the last test to gain an overall mean of 55%?
Response:
