Step-by-step explanation:

mean=sum of observation÷No.of observations

mean=67+65+71+57+45÷5

mean=305÷5

mean=61

Verified answer

Answer:

61

Step-by-step explanation:

Weight of 5 persons = 67 kg, 65 kg, 71 kg, 57 kg, 45 kg

Mean = Sum of observations/ Number of observations

          = (67 + 65 + 71 + 57 + 45)/5

          = (305)/5

          = 61

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