Math, asked by rapennagesh07, 4 months ago

If the mean of a set of observations×1, ×2,...,....,×10 is 20. find the mean of ×1+4,×2+8,×3+12,.... ....×10+40.

Answers

Answered by bson

1

Step-by-step explanation:

4+8+12+...+40 = 4(1+2+3+..+10) = 4× 10×11/2 = 220

220/10 =22

new mean = 20+22 = 42

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