Math, asked by safashaheda43, 2 months ago

a bag contains 3 red balls and 4balls . A ball is selected at random from the bag, what is the probability that the ball selected ne 1) black 2) red​

Answers

Answered by surekhakasture19
0

Answer:

Total no. of balls in the bag is 12 (3 red, 5 black and 4 white)

Solution(i):

No. of white balls in bag is 4

Therefore,

4

C

1

( Selecting 1 out of 4 items) times out of

12

C

1

( Selecting 1 out of 11 items) a white ball is picked.

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

We know that, Probability P(E) =

(Total no.of possible outcomes)

(No.of favorable outcomes)

=

12

C

1

4

C

1

=

12

4

=

3

1

Solution(ii):

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

Solution(iii):

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

Solution(iv):

No. of balls that are not red in bag is 9 (5 black, 4 white)

Therefore,

9

C

1

( Selecting 1 out of 9 items) times out of

12

C

1

( Selecting 1 out of 12 items) a ball that is not red is picked.

Let E be the event of drawing a ball that is not red from bag

We know that, Probability P(E) =

(Total no.of possible outcomes)

(No.of favorable outcomes)

=

12

C

1

9

C

1

=

12

9

=

4

3

Answered by bindua2017
0

Answer:

hi friends

Step-by-step explanation:

total number of balls = 4+3 =7

No.of red balls = 3

No.of black balls = 4

(1)P(getting black balls) = 4/7

(2)P(getting red balls) = 3/7

hope this answer is helpful

thank u

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