1.

20, मापनो `x_(1),x_(2),x_(3),...........x_(20)` का औसत y, है। तब, `(x_(1)-101),(x_(2)-101),(x_(3)-101)...... (x_(20)-101)` का औसत ज्ञात करे?A. `y-20`B. `y-101`C. `20 y`D. `101y`

Answer» Correct Answer - B
According to question
` (x_1+x_2+x_3+x_4+…..+x_20)/20=y`
`x_1+x_2+x_3+x_4+. . . .+x_20=20y`
`implies(x_1-101+x_2-101+x_3-101+. . . ..x_20-101)/20`
`implies ((x_1+x_2+x_3+. . . +x_20)-(20xx101))/20`
`implies (20y-20xx101)/20`
`implies` y-101


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