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Arithmetic mean of a set of 40 values is 65. If each of the 40 values is increased by 5, what will be the mean of the set of new values?

Asked by Topperlearning User 6th November 2017, 1:12 PM
Answered by Expert
Answer:

begin mathsize 12px style According space to space the space question space mean space of space the space 40 space values space is space 65.
Sum space of space 40 space values space equals space 40 cross times 65 equals 2600
Each space value space increased space by space 5 space hence space total space of space the space new space values space increases space by
40 cross times 5 equals 200
New space sum space of space the space all space values space equals space 2600 plus 200 equals 2800
Arithmetic space mean space of space the space new space values space equals space 2800 over 40 equals space 70

Hence comma space if space each space value space increases space by space 5 space then space arithmetic space mean space also space increases space by space 5. end style

Answered by Expert 6th November 2017, 3:12 PM
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