Question

If the mean of � and 1 � is M, then the mean of � 2 and 1 � 2 is

Answer 1

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Answer 2

let ur question mark is x then

CASE 1
given mean of x , 1 ,x is M

so
x + 1 +x /3 = M

2x + 1 = 3M
2x = 3M -1 ………………………………………(i)

Case 2

MEAN of x , 2 , 1 , x ,2 will be

mean =( x + 2 + 1 + x + 2)/5

Mean = (2x + 5)/5

using eq. (i)
Mean = (3M-1+5)/5
mean = (3M+4)/5

thus ur mean will be (3M+4)/5

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