If a group of '

x

' people can complete a work in '

x

' days and if '

Y

' number of people can not cooperate with the remaining ones due to some personal reason and the work is now completed in 'Z' days, then which of the following option are true?\ A.

,Y=Z(x-Z)/(x)

\ C.

,Y=Z(Z-x)/(x)

\ D.

,Y=x(Z-x)/(Z)

If a group of 'X' people can complete a work in ' X ' days and if ' Y ' number of people can not cooperate with the remaining ones due to some personal reason and the work is now completed in 'Z' days, then which of the following option are true? A. Y=Z(XZ)/X B. Y=X(XZ)/Z C. Y=Z(ZX)/X D. Y=X(ZX)/Z