a and b finish the job in 15 days . while a , b and c can finish it in 3 days . c alone will finish the job in
"explanation : 3 = ( 15 * x ) / ( 15 + x ) 45 + 3 x = 15 x 12 x = 45 x = 3.75 answer : option b"
divide(multiply(3, 15), subtract(15, 3))