Question

Q35)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

Answer:

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ANSWER

Let number of blue balls in the bag =x

Total no of balls in bag =5+x [No. of redball =5]

Probability of drawing a blue ball =

Total no of ball

No. of blue ball

P(B)=

5+x

x

Probability of drawing a Red ball =

Total no of ball

No. of red ball

P(R)=

5+x

5

Given,

P(B)=2P(R)

5+x

x

=2(

5+x

5

)

x=10

Hence, no. of blue balls in the bag =10.

Answer 2

Answer:

number of red balls =5

blue balls =5×2=10

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