Math, asked by Thaneesh61, 1 year ago

if the mean of 6 observations x,x+3,x+6,x+9,x+12 and x+15 is 18.find the mean of first 4 observations

Answers

Answered by mario7028

4

6x+45=84
x=6.5
first 4 mean
4x+18÷4=24.5

Answered by Adiadvi

0

Answer:

MEAN OF FIRST 4 OBSERVATIONS IS 15.

Explanation is in Attachment.

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