Math, asked by abhiram2005939ys5, 4 months ago

A bag containing 5 ned, 8 white and 4 black balls.
A bal is drawn at random from the bag. Find the
Pobablity that the drawn ballo is
i red es) white li I not a white ball-​

Answers

Answered by jainmuskaan2007
1

Answer:

Step-by-step explanation:

ANSWER

Total no. of balls in the bag is 20 (5 red, 7 black and 8 white)

Solution(i):

No. of red or white balls in bag is 13 (5 red and 8 white)

Therefore,  

13

C  

1

​  

( Selecting 1 out of 13 items) times out of  

20

C  

1

​  

( Selecting 1 out of 20 items) a red or white ball is picked.

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

We know that, Probability P(E) =  

(Total no.of possible outcomes)

(No.of favorable outcomes)

​  

=  

20

C  

1

​  

 

13

C  

1

​  

 

​  

=  

20

13

​  

 

Solution(ii):

No. of non-black balls in bag is 13 (5 red and 8 white)

Therefore,  

13

C  

1

​  

( Selecting 1 out of 13 items) times out of  

20

C  

1

​  

( Selecting 1 out of 20 items) a non-black ball is picked.

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

We know that, Probability P(E) =  

(Total no.of possible outcomes)

(No.of favorable outcomes)

​  

=  

20

C  

1

​  

 

13

C  

1

​  

 

​  

=  

20

13

​  

 

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

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