Question

A bag has 5 red balls and 4 black balls.Find the probability of a red ball and a black ball.​

Answer 1

Given :

• Red balls = 5

• Black balls = 4

To Find :

• Probability of getting a red ball and a black ball

Solution :

Probability = Outcome no. / Total no.

Probability of getting red ball = 5/9

Probability of getting black ball = 4/9

Answer 2

Step-by-step explanation:

Given:

No of red balls = 5

No of black balls = 4

To find:

Probablity of getting red ball and black ball

Solution:

Total no of red balls = 5

Total no of black balls = 4

Total no of balls = n(S) = 5 + 4 = 9

Let A be the probability of getting a red ball

P(A) = $\sf{\dfrac{n(a)}{n(s)}}$

p(A) = $\sf{\dfrac{5}{9}}$

p(B) = 1 - p(A)

= 1 - $\sf{\dfrac{5}{9}}$

= $\sf{\dfrac{4}{9}}$