Question

A box congaing 8 white and 12 black halls then probability of drowning a white ball is

Answer 1

Step-by-step explanation:

Solution(iii):

No. of neither black nor white balls in bag is 5 (5 red balls)

Therefore,

5

C

1

( Selecting 1 out of 5 items) times out of

20

C

1

( Selecting 1 out of 20 items) a neither white nor black ball is picked.

Let E be the event of drawing neither white nor black ball from bag

We know that, Probability P(E) =

(Total no.of possible outcomes)

(No.of favorable outcomes)

=

20

C

1

5

C

1

=

20

5

=

4

1