Question

Please give only right answer, if you know. The mean of "n" observations is x .If the first observation is increased by 1, the second by 2 and third by 3 and so on then the new mean is:
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Answer 1

Answer:

x+ (n+1)/2

Step-by-step explanation:

sum of n observations = nx

now sum sum increased by 1+2+3+4...n = n(n+1)/2

nx + n(n+1)/2

new mean = __________

n

= x + (n+1)/2