The mean time for the first three finishers was 5.75 mins.After checking his stopwatch, he notices that the stopwatch began timing at 15 secs rather than at 0, resulting in scores each of which is 15 secs too long.What is the correct mean time?Please help
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5.50 minutes, or 5.75 minutes minus 15 seconds. Reason this out: Suppose three times recorded were 5.50, 5.75 and 6.00 minutes, resulting in a mean of 5.75. But the ACTUAL times were 5.25, 5.50 and 5.75, which gives us a mean of 5.50. -
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