Question

Number of blue balls are X, number of black balls are Y and number of green balls are 11. Their total is X+Y+11. Calculate the probability of drawing a black ball and a blue ball. Also find the value of X and Y.

Answer 1

Answer:

Let number of blue balls =x

Total number of balls =5+x

Probability for a red ball =  

x+5

5

​  

 

Probability for a blue ball =  

5+x

x

​  

 

According to the question

5+x

x

​  

=2(  

x+5

5

​  

)⇒x=10 ∴

Number of blue balls=10.

Step-by-step explanation: