Question

a bag contains 5 red balls and some Blue Balls if the probability of drawing a blue ball is double that of red ball determine the number of blue balls in the bag​

Answer 1

Answer:

Step-by-step explanation:

let number of blue ball = x

Given  

Probability(Blue ball)= 2*Probability(Red ball)

(x/(5+x))=2(5/(x+5))

solve x=10

Answer 2

Answer:

Step-by-step explanation:

Let total balls be x

So blue balls are x-5

According to the question

5-x=2(5/x)

5-x=10/x

5x-x^2=10

This is equal to

-x^2+5x-10

Equals

X^2-5x+10

Now solve by quadratic