A bag contains 2 white balls, 3 black balls and 4 red balls. In how many ways can 3 balls be drawn from the bag, if at least one black ball is to be included in the draw?
Correct Answer : A
A, B and C are employed to do a piece of work for Rs. 529. A and B together are supposed to do 19/23 of the work and B and C together 8/23 of the work. What amount should A be paid?
A is twice as good a workman as B and together they finish a piece of work in 14 days. The number of days taken by A alone to finish the work, is
If 13 men can complete a piece of work in 36 days, then in how many days will 18 men complete the same work?