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Company $\text{X}$ shipped $5$ computer chips, $1$ of which was defective. and company $\text{Y}$ shipped $4$ computer chips, $2$ of which were defective. One computer chip is to be chosen uniformly at a random from the $9$ chips shipped by the companies. If the chosen chip is found to be defective, what is the probability that the chip came from the company $\text{Y}?$

  1. $2/9$
  2. $4/9$
  3. $2/3$
  4. $1/2$
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We can choose any one from 9 chips =9C1 ways

Now we are choosing defective one from company Y

Probability will be=2C1 / 9C1 =2/9

Answer:

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