a and b finish the job in 15 days . while a , b and c can finish it in 11 days . c alone will finish the job in
explanation : 11 = ( 15 * x ) / ( 15 + x ) 165 + 11 x = 15 x 4 x = 165 x = 41.25 answer : option a
divide(multiply(11, 15), subtract(15, 11))