A bag contains 4 red and 3 black balls.A ball is picked up.If it is black it is discarded else if it is red it is put back with another red ball.What is the probability that the second ball drawn is red?

Question

HelloWorld · Answer

32/(18+32) ,i.e. 16/25. Make cases for each ball and add up the total number of red and black balss in each case respectively. The number of red balls upon the total number of balls will be the answer.

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A bag contains 4 red and 3 black balls.A ball is picked up.If it is black it is discarded else if it is red it is put back with another red ball.What is the probability that the second ball drawn is red?

A bag contains 4 red and 3 black balls.A ball is picked up.If it is black it is discarded else if it is red it is put back with another red ball.What is the probability that the second ball drawn is red?

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