Question

1.
A bag contains 3 red balls and 5 black balls. A ball is selected at random from the bag.
What is the probability that the ball selected is (i) red ? (ii) not red?​

Answer 1

Answer:

1. 3/8

2. 5/8

Step-by-step explanation:

probability = no. of favourable outcomes/ no.of total outcomes.

In the first question there are 3 red balls and 3+5 = 8 total balls, so the answer in 3/8

In the second part, there are 5 balls which are not red and 8 total balls, so 5/8 is the correct answer

Answer 2

Answer:

1) 3 2) 5

8 8

Step-by-step explanation:

Total number of balls = 5+3 = 8

Sample space( P(S) ) = 8

1.red

Number of red balls ( N(A) ) = 3

P(A) = N(A)

N(S)

= 3

8

Therefore probability of getting red balls is 3.

8

2.not red

P(A') = 1 - P(A)

= 1 - 3

8

= 8 - 3

8

= 5

8

Therefore probability of getting not red balls is

5

8.