Question

the mean of 10 observation is 15 if 3 is added to the first 5 observation find the mean of new set of observation
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Answer 1

Answer:

Step-by-step explanation:

Hey mate,...

Here's your answer,...

Mean of 9 observation =13

sum=13*9=117

Mean of the first 5 observations i= 12,

Therefore, sum of the first five observations=60

Mean of the last 5 observations=15

sum of abservations=75

As the middle observation is the 3rd one,...

Hence, the third observation is=(60+75)-117

135-117=18

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