Question

A bag contains 12 balls out of which p are green,
(i) If one ball is drawn at random find the probability that it is green.
(ii) If 6 more green balls are put in the bag, the probability of drawing a green ball will be double than that in part (i). Find p.

Answer 1

Answer:

total no. Possible outcome=12

total no. of outcome=p

so, probablity of getting green ball=p/12

again, (p+6) /18=2×p/12

so, p=3

total no of green ball=3