An urn contains m white and n black balls. A ball is drawn at random and is put back into the urn along with k additional balls of the same colour as that of the ball drawn. A ball is again drawn at random. What is the probability that the ball drawn now is white ?
Text Solution
Verified by Experts
The correct Answer is:
`(m)/(m+n)`.
Topper's Solved these Questions
PROBABILITY
FIITJEE|Exercise Exercise 7|2 Videos
PROBABILITY
FIITJEE|Exercise Exercise 5|3 Videos
PERMUTATIONS & COMBINATIONS
FIITJEE|Exercise NUMERICAL BASED|3 Videos
PROGRESSION & SERIES
FIITJEE|Exercise NUMERICAL BASED|3 Videos
Similar Questions
Explore conceptually related problems
An urn contains m white and n black balls.A ball is drawn at random and is put back into the urn along with k balls of the same colour as that of the ball drawn.a ball is again drawn at random.Show that the probability of drawing a white ball now does not depend on k.
A bag contains w white and b black balls. A ball is drawn at random and put back in the bag with k additional balls of the same colour. A ball is again drawn at random from the bag. The probability that it is black is
A bag contains 6 black and 8 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
A bag contains 3 white and 2 red balls. One ball is drawn at random. What is the probability that the ball drawn is red?
A bag contains 5 white and 7 red balls. One ball is drawn at random. What is the probability that ball drawn is white?
A box contains 4 white and 5 black balls. A ball is drawn at random and its colour is noted. A ball is then put back in the box along with two additional balls of its opposite colour. If a ball is drawn again from the box, then the probability that the ball drawn now is black, is
An urn contains 5 red and 6 black balls. A ball is drawn at random, its colour is noted and is returned to the urn. Moreover, 2 additional balls of the colour drawn are put in the urn and then a ball is drawn at random. What is the probability that the second ball is red ?
A bag contains 5 white and 7 red balls.One ball is drawn at random.What is the probability that ball drawn is white?
A bag contains 30 white and 10 red balls. One ball is drawn at random. What is the probability that the ball drawn is red?
