Question

A box contains 40 pens out of which x are non- defective. If one pen is drawn at random , the probability of drawing a non- defective pen is y. If we replace the pen drawn and then add 20 more non- defective pens is 4y.Then, evaluate the value of x?

Answer 1

Answer:

4y,20 plus and jo ans aya ga uske sath x lage ga