Find the average of first 10 multiples of 7
A. 35.5 B. 37.5 C. 38.5 D. 40.5
Answer And Explanation
Answer: Option C
Explanation:
=7(1+2+3+...+10)10=7(1+2+3+...+10)10
=7(10(10+1))10×2=7(10(10+1))10×2
=7(110)10×2=38.5=7(110)10×2=38.5
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