Question

The mean of 9 observation is 37.if the mean of first five observation is 39 and that of last 5 observation is 34. Find the fifth observation

Answer 1

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Step-by-step explanation:

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Answer 2

Answer:

mean = sum of all obs. / total no. of obs.

37= sum of all obs. / 9

37 *9 = sum of all obs

333 = sum of all obs

Step-by-step explanation:

let 5th obs is x then

sum of 5 observations is = 195

sum of last 5 observations = 170

so 5th observation = sum of First 5 observation + sum of last 5 observation - sum of all 9 observation

5 th observation = 195 +170 - 330

5th observation= 35