Question

The mean of 15 numbers is 5.If 2 is added to each number ,then what will be the new mean...(ITS ANSWER IS 7 I NEED FULL EXPLANATION)​

Answer 1

Answer:

the mean of 15 numbers is 5

therefore their sum=15*5=75

if 2 is added to each number then 2 is added to the all the 15 numbers

therefore 2*15 or 30 more will be added to the sum or 75

=75+30=105

therefore new mean = 105/15=7 [mean=sum of observations/no. of observations]

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Answer 2

Answer:

Answer = 7

Step-by-step explanation:

The mean of 15 numbers is 5

therefore, their sum= 15*5=75

If 2 is added to then 2 is added to the all 15 numbers.

Therefore 2*15 or 30 more will be added to the sum or 75

75+30= 105

Therefore new mean 105/15=7

[Mean= Sum of observation/ no. of observations]

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