Question

Find the arithmetic mean of 1)The first six odd numbers 2)first five prime numbers

Answer 1

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${\bold{\large{\underline{step-by-step-explanation:}}}}$

(1). $<b>The first 6 odd numbers are 1, 3, 5, 7, 9, 11 =>sum of observations = 1+3+5+7+9+11 = 36 =>no. of observations = 6$

$arithmetic \: mean = \frac{sum \: of \: observations}{no \: of \: observations}$

$arithmetic \: mean = \frac{36}{6} = 6$

(2).$<b> The first 5 prime numbers are 2, 3, 5, 7 and 11 =>sum of observations = 2 + 3 + 5 +7 + 11 = 28 =>no. of observations = 5$

$mean = \frac{28}{5} = 5.6$

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