Question

a bag contain 5 red balls and Sume blue balls . if the probability of drawing a blue ball is double that of a red ball, then the number of blue balls in a bag is ​

Answer 1

Answer:

.........................

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Answer 2

Step-by-step explanation:

let the no. of blue balls be x

now

2 × probability of drawing red ball = probability of drawing blue ball

$\frac{5×2}{5 + x} = \frac{x}{5 + x} \\ \frac{2×5}{5 + x} = \frac{x}{5 + x} \\2× 5 = x \\ x = 10\: \: \: \: ans$