Question

If the mean of x1 and x2 is M1 and that of x1, x2, x3, x4 is M2, then mean of ax1, ax2,
3 4
x x
,
a a
is
(A) M M 1 2
2

(B)
2
1
M
aM
2
2
 
    
(C)  
2
1 2
1
a 1 M 2M
2a
      (D)  
2
1 2
1
2 a 1 M M
2a
     

Answer 1

Answer:

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