Find the mean first 10 odd multiples of 7
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Answered by
5
begin{aligned}
= \frac {7(1+2+3+...+10)}{10}
\end{aligned}
\begin{aligned}
= \frac {7(10(10+1))}{10 \times 2}
\end{aligned}
\begin{aligned}
= \frac {7(110)}{10 \times 2} = 38.5
\end{aligned}
Answered by
13
Answer:
the mean first 10 odd multiples of 7 = 70
Step-by-step explanation:
Find the mean first 10 odd multiples of 7
First 10 odd multiples of 7 are
7 * 1 = 7
7 * 3 = 21
7 * 5 = 35
7 * 7 = 49
7 * 9 = 63
7 * 11 = 77
7 * 13 = 91
7 * 15 = 105
7 * 17 = 119
7 * 19 = 133
Sum of these = 7 * ( 1 + 3 + 5 + ................................15 + 17 + 19)
= 7 * (10/2)*(1 + 19)
= 35 * 20
= 700
Mean = Sum/ Numbers = 700/10 = 70
the mean first 10 odd multiples of 7 = 70
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