In an examination 30% students have failed in mathematics, 20% of the študents have failed in chemistry and 10% have failed in both mathematics and chemistry. A student is selected at random. What is the probability that () the student has failed in mathematics if it is known that he has failed in chemistry. (ii) What is the probability that the student has failed either in mathematics or chemistry ?

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A: According to our guidelines we can answer only first question and rest can be reposted.

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A: Note:Thank you for the question. As your question has more than 3 parts, according to our policy, we…

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A: Hi! Thanks for posting the question. Since there are more than three sub-part questions, we will…

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