Question

A bag contains blue and red balls. Two balls are drawn randomly without replacement. The probability of selecting a blue and then a red ball is 0.2. The probability of selecting a blue ball in the first draw is 0.5. What is the probability of drawing a red ball, given that the first ball drawn was blue?

Answer 1

Answer:

10 balls in bag

give it brainliest

Answer 2

The probability of drawing a red ball, given that the first ball drawn was blue is 0.4 .

Explanation:

Given : A bag contains blue and red balls. Two balls are drawn randomly without replacement.

Let the events are

B= Drawing a blue ball

R = Drawing a red ball

Then ,

P(B ∩ R) =0.2

P(B)= 0.5

Now , by conditional probability , we have

$P(R|B)=\dfrac{P(R\cap B)}{P(B)}\\\\ =\dfrac{0.2}{0.5}=0.4$

Hence, the probability of drawing a red ball, given that the first ball drawn was blue is 0.4 .

# Learn more :

A bag contains 6 red balls 3 blue balls and 8 green balls A ball is drawn randomly from the bag find the probability that a ball drawn is blue

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