1.

If the mean of x_(1) and x_2is M_1 and that of x_1,x_2, x_3, x_4is M_2 , the mean of x_(1),x_(2)//a,x_(3)+a,x_(4)-ais

Answer»

`M_2+((a-1)(x_1-2M_1))/(4A)`
`M_1+((a-1)x_1-2M_2)/(4a)`
`M_2/(4a)+(a-1)x_1+2M_1`
`M_1/(4a)+(a-1)x_2+2M_2`

ANSWER :A


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