Question

25. (a) A bag contains 5 red balls and some blue balls. If the probability of drawing a blue
ball is double that of a red ball, determine the number of blue balls in the bag.​

Answer 1

Step-by-step explanation:

1/x+5=1/5

1/x+5=1+5

1/x=5-1/5

1/x=24/5

P(x)=5/24

Answer 2

answer:

Let there be

x

number of blue balls in the bag.

Number of red balls = 5

Thus, the total number of balls = total possible outcomes = 5 +x

P ( getting red ball) = 5

___

5+x

and,

P ( getting blue ball) = x

-———

5+x

according to Que,

P ( getting blue ball) = P ( getting red ball)

=x

____ =2. ( 5 )

5+x ______

5+x

⟹ x= 2.5 = 10