wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

The mean of a sample of size 10 is 15. If the value of each item is reduced by 2, the mean of the sample will be_____.

A
15
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
13
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
11
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
22
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 13

Mean refers to the average amount in a given group of data. So arithmetic mean can be calculated by adding the first term and the last term of the series and then dividing the sum by 2. In the given series the first term 'a' is decreased by 2 and the last term 'b' is also decreased by 2 , so the

Mean = {(a-2)+ (b-2)} /2

= (a+b-4) /2

= {(a+b)/2} - 4/2

= {(a+b)/2} - 2

Therefore, the mean is also decreased by 2. So,if the mean was 15 then now it will be 13.


flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Arithmetic Mean
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon