Question

12. A bag contains '3' red balls and 4 black balls. A ball is selected at
random from the bag, what is the probability that the ball selected
be
1) Black 2) Red​

Answer 1

Answer:

A bag contains '3' red balls and 4 black balls. A ball is selected at

random from the bag, what is the probability that the ball selected

be

1) Black 2) Red

Answer 2

No. of black balls in bag is 5

Therefore,

5

C

1

( Selecting 1 out of 5 items) times out of

12

C

1

( Selecting 1 out of 12 items) a black ball is picked.

Let E be the event of drawing a black ball from bag

We know that, Probability P(E) =

(Total no.of possible outcomes)

(No.of favorable outcomes)

=

12

C

1

5

C

1

=

12

5

No. of red balls in bag is 3

Therefore,

3

C

1

( Selecting 1 out of 3 items) times out of

12

C

1

( Selecting 1 out of 12 items) a red ball is picked.

Let E be the event of drawing a red ball from bag

We know that, Probability P(E) =

(Total no.of possible outcomes)

(No.of favorable outcomes)

=

12

C

1

3

C

1

=

12

3

=

4

1