Question

A bag contains 7 white balls and 5
black balls In how many ways 4
balls can be drawn form the bag if 2
must be white and 2 must be black​

Answer 1

Answer:

no of white balls = 7

no. of black balls = 5

therefore no. of total balls = 12

therefore probability of getting two black balls and two white balls are

= no. of two black and two white balls at same time /12

= 1+1/12

= 2/12

=1/6

HOPE IT WILL HELP YOU