Question

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:

10

Step-by-step explanation:

Answer 2

Answer:

Step-by-step explanation:

there are five red balls and some red balls so we have to find that some blue balls.

To find the no. blue of balls in the bag ?

the no. of blue balls will be x

and its given that , blue ball is double of that of a red 2x

then,

the the total no. of outcomes will be (5+x) as we dont know that how many blue balls are there in bag so, we have assumed that the no. of blue balls be x so we have to do sum of no. of balls of two.

Now,

so we will form a equation to find the no. of blue balls in the bag

Probabability of blue ball = 2*probability of red ball

     x   =  2(5)

   5+x     5+x

x = 10

5+x will gets canceled cuz they are same in the both of the equation.

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