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Arin has to visit at random three of his friends A, B and C over a week-end. What is the probability that he visits:

(a) B before C (b) B before C and C before A

(c) C first (d) A just before B

(e) A either first or last?

In a class, 45% of students study Mathematics and 35% study Biology. 60% students of the class studies at least one of the two subjects. Find the probability that a randomly selected student from the class will be studying both the subjects.

A, B, C are three mutually exclusive and exhaustive events of a random experiment. Find the values of P(A), P(B) and P(C), given that

If A and B are two mutually exclusive events, then prove that P(A ∪ B) = P(A) + P(B)

If events A and B are not mutually exclusive, then prove that P(A ∪ B) = P(A) + P(B) - P(A ∩ B)

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The major components of our food are carbohydrates, proteins and fats.

Answer The major components of our food are carbohydrates, proteins and fats.