8. The mean of first three terms is 14 and mean of next two terins is 18. The mean of all five terms is @ 14 (d) none of these (b) 15.6 (a) 14.5 (a) O (b) 0 O (C) (d)
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mean of first three terms ;
x/3 = 14
x = 14×3
x = 42
mean of next two terms ;
x/2 = 18
x = 18×2
x = 36
total sum of observations = 42+36
total no. of observations = 3+2
mean = 78/5
= 15.6
this is ur required answer
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