If the sum of a few numbers is 450 and their mean is 50 and if another number 100 is included, then mean would become:- A. 55 B. 60 C. 75 D. 150
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Answered by
7
HEY MATE HERE IS YOUR ANSWER
mean =sum of observations /no of observation
mean =50
sum of observation =450
substitute in the above equation
no of observation = 9
if 100 is added to the sum we get 550
no of observations are 9 + 1 = 10
hence the new mean is 55
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Answered by
1
Answer:
A. 55
Step-by-step explanation:
Sum of nos. = 450
Mean of nos. = 50
Count of nos. whose sum is 450 and mean is 50 = sum of nos. / mean of nos. = 450/50 = 9
So now,
New sum = 450 + 100 = 550
Couny of nos. = 10
New mean = 550/10 = 55
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