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CBSE Class 7 Answered

A survey was taken on 30 classes at a school to find the total number of left-handed students in each class. The table below shows the results: No. of left-handed students 0 1 2 3 4 5 Frequency (no. of classes) 1 2 5 12 8 2 A class was selected at random.Find the probability that the class has 2 left-handed students.
Asked by Topperlearning User | 30 Oct, 2017, 08:22: AM
answered-by-expert Expert Answer

Let S be the sample space and

A be the event of a class having 2 left-handed students.

n(S) = 30

n(A) = 5

Answered by | 30 Oct, 2017, 10:22: AM

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