a group of 80 students are selected of class X and asked for their choice of subject to be taken in class XI which is recorded as below.

If a student is chosen at random find the probability that is a student of either commerce or humanities stream.

Dear student
Number of students    who  opted for commerce or humanities stream=21+12=33Total number of students =29+18+21+12=80 Probability that the student has either opted commerce or humanities stream=favouable outcomestotal outcomes=3380=0.4125

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Answer - 33/80
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