Math, asked by mogi3, 1 year ago

the mean of 25 number is 12. if 3 is added to each number find out new mean

Answers

Answered by mysticd
2
Hi ,

Mean of 25 numbers = 12

If 3 is added to each number then

the new mean = first mean + 3

= 12 + 3

= 15

I hope this helps you.

: )
Answered by suki9999
0

We know, mean =∑x/total number of data(n)
so ∑x= mean* total number of data that is 12*25=300

Now if 3 is added to each number a total of 3*25(i.e 75) is added to the ∑x while the total number of data (n) remains the same.
so now the mean is
mean= 375/25               [300(∑x) +3*25]

 Therefore  mean =15

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