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CBSE Class 10 Compartment Exam 2023

In class XI of a school 40% of the students study Mathematics and 30% study Biology.10% of the class study both mathematics and biology.If a student is selected at random from the class,find the probability that he will be studying Mathematics or Biology or both.

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.

The probability of hitting a target in any shot is 0.5 If 10 shorts are fired , find the probability that the target will be hit in an odd number of times .

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