Question

a bag contains 5 red and some Blue Balls if probability of drawing a blue ball from the back is twice that of a red ball find the number of blue balls in the bag

Answer 1

Hey

Here is your answer,

let number of blue ball = x

Given

Probability (Blue ball)= 2 x Probability(Red ball)
(x/(5+x))=2(5/(x+5))
(X/(5+x)) = 10/x+5
10(5+x)=x(x+5)
50+10x=x^2+5x
50+10x -5x=x^2
50+5x=x^2
X^2 - 5x -50=0

Diving this equation,
x=10

Hope it helps you!

Answer 2

Please Mark it as brainiest