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Question:

In a particular section of class IX, 40 students were asked about the month of their birth and following graph was prepared for data so obtained: Find the probability that a student of the class was born in August.

Solution:

Number of students born in August = 6
Total number of students = 3 + 4 + 2 + 2 + 5 + 1 + 2 + 6 + 3 + 4 + 4 + 4 = 40
Probability of students born in August = (Number of students born in August) / (Total number of students) = 6/40 = 3/20