If mean of n observations is x . If the first observation is increased by 2 second by 4 and third by 6 and so on find the mean of new observation.(PL answer it according to class 10 level)
Answers
Answered by
69
Answer: x+n+1
Step-by-step explanation:
Given that the mean of n observations is x,
sum of x observations S(x) / number of observations (n) = x
S(x) / n = x
S(x) = nx
sum of new observations = S(x) + 2 + 4 + 6 + ....... + n
= nx + n/2 (2a + (n-1)d)
= nx + n/2 (4 + (n-1)2)
= nx + n/2 (2 + 2n)
= nx + n(n+1)
= n(x+n+1)
New mean = sum of new observations/ number of observations
= n(x+n+1)/n
= x+n+1
Answered by
14
Answer:
hey mate here is ur answer
Attachments:
Similar questions