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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?

Amit , 10 Years ago
Grade 10
anser 1 Answers
HelloWorld

Last Activity: 10 Years ago

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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