If the mean of 6, 7 ,x, 8 ,y ,14 is 9 then;
a) x+y=21
b) x+y = 19
c) x-y=19
d)x-y=21

Question

Manbar Singh · Accepted Answer

The given observations are :6, 7, x, 8, y, 14
Number of observations = 6     Mean = 9⇒sum of observationsnumber of observations = 9⇒6+7+x+8+y+146 = 9⇒35+x+y6 = 9⇒x+y = 54-35⇒x + y = 19

If the mean of 6, 7 ,x, 8 ,y ,14 is 9 then; a) x+y=21 b) x+y = 19 c) x-y=19 d)x-y=21

If the mean of 6, 7 ,x, 8 ,y ,14 is 9 then;
a) x+y=21
b) x+y = 19
c) x-y=19
d)x-y=21