A man slept 5 hours a day for the first two days, 6 hours a day for the next 3 days, but did not sleep on the 6th day. For how long did he sleep on the average in the first six days ?
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Average -Sum/N
Sum = 5×2+6×3+0 = 28
N= 6
average = 28/6 = 4•66
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