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प्रश्न
Find the mean of first 12 even numbers.
उत्तर
The first 12 even numbers are:
2,4,6,8, 10, 12, 14, 16, 18,20,22,24
`barx = (x_1 + x_2 + x_3 + ...... + x_n)/n`
n = 12
⇒ `barx = (2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20 + 22 + 24)/12 `
⇒ `barx = 156/12`
⇒ `barx = 13`
Therefore , Mean of first 12 even numbers = 13
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