Mean of 15 observation is 23. If each observation is multiplied by 2. Find new mean.
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46 would be new mean due to multiplying every no. with 2.
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Tatal numbers=15(x1,x2-------x15)
mean=23
sum of all 15 numbers =15×23
(x1+x2+x3------x15)=345
if each no is multiply by 2
new no (2x1,2x2-----2x15)
2(x1+x2-------x15)
2×345
=690
New mean= 690/15
46
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