Question

Find the mean of first ten even numbers ​

Answer 1

Step-by-step explanation:

mean of first 10 even numbers

numbers are 2,4,6,8,10,12,14,16,18,20

mean is:

$2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20$

$6 + 14 + 22 + 30 + 38$

$20 +30 + 60$

$50 + 60$

$110$

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Answer 2

We know mean is sum of the series by number of terms in the series

Therefore the terms i.e. 2,4,6,......20

Number of terms is 10

Since the series is in arithmetic progression the mean is the average of first and last term

2+20/2=11