Question

9. 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, find the number of blue balls in the bag.(ver urgent please help me)​

Answer 1

10 blue balls are there

hope it helps you ✌️ friend

Answer 2

Answer:

If the probability of drawing a blue ball is double that of a red ball, determine the number of blue balls in the bag. Let number of blue balls be x. Red balls are 5. ∴ Total blue balls are 10.

Step-by-step explanation:

Let number of blue balls in the bag =x

Total no of balls in bag =5+x  [No. of red ball =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