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In a class 40% of the students offered Physics 20% offered Chemistry and 5% offered both. If a student is selected at random, find the probability that he has offered Physics or Chemistry only.

In a class, 30% of the students offered mathematics, 20% offered chemistry and 10% offered both. If a student is selected at random, find the probability that he has offered mathematics or chemistry.

In a class,30% of the students offered English,20% offered Hindi and 10% offered both.If a student is selected at random,what is the probability that he has offered English or Hindi? (2)/(5) (b) (3)/(5) (c) (3)/(4) (d) (3)/(10) (e) None of these

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