Question

a bag contains 3 white and 4 black ballsall identical in shape if a man takes out only 2 balls in one ayttemt . what is the probalblity that both balls may be white ?

Answer 1

Answer:

Two ways to answer this.

The probability of the first of the two balls being red is 2/(4+3+2) = 2/9. The probability of the second ball being red is 1/8. The probability of them both being red is 2/9 * 1/8 = 2/72 = 1/36