Question

A bag contains 20 balls out of which 5 red ,6 black and rest are white , one ball is drawn at random. What is the probability that it is a white ball ?

Answer 1

Answer:

9/20

Step-by-step explanation:out of 20 balls 1 ball can be drawn in 20C1 ways

20C1=20;so n(S)=20

now,we have to choose 1 white ball

out of 9 white ball 1 ball can be drawn in 9C1 ways 9C1=9;so we can write n(E)=9

Now probablity of event=n(E)/n(S)=9/20

so the answer will be 9/20.

Answer 2

Probability of getting a white ball is 9/20

Beacause

Number of Possible outcomes = 20

Number of Favourable outcomes = 9

And,

Probability= Number of Favourable outcomes

Number of Possible outcomes

So Ans is

Probability = 9

20