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A bag contains four balls. one is blue, one is white and two are red. someone draws two balls at random from the bag. he looks at them and tells you that there is a red ball among the two balls drawn out. what is the probability the the other ball drawn out is also red?

Respuesta :

sunshine100503
There is a 1/3 chance or 33% chance that the other ball is also red.
fichoh

The probability that the other other ball drawn is also red is 1/7

  • Total number of balls = (4 + 1 + 1 + 2) = 8

First pick :

  • P(red) = number of red balls ÷ total number of balls
  • P(red) = 2 / 8 = 1/4

Second pick (without replacement) :

  • P(red) = number of red balls ÷ total number of balls
  • Number of red balls left = 1
  • Total number of balls left = 8-1 = 7
  • P(red) = 1/7

Therefore, the probability that the other ball is also red is 1/7

Learn more :https://brainly.com/question/18153040

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