The table given below shows the marks obtained by 80 students of a class in a test with maximum marks 100 . A student of the class is selected at random . Find the probability that he gets (i) less than 15% marks , (ii) 60 or more marks and (iii) less than 45 marks .

The table given below shows the marks obtained by 80 students of a cla

1.	The table given below shows the marks obtained by 80 students of a class in a test with maximum marks 100 . A student of the class is selected at random . Find the probability that he gets (i) less than 15% marks , (ii) 60 or more marks and (iii) less than 45 marks .
Answer» Total number of students = 80 . (i) P(The student gets less than 15% marks) = `("number of students getting less than 15 marks")/("total number of students")` `= (6)/(80) = (3)/(40)` . (ii) P(The student gets 60 or more marks) `= ("number of students getting 60 or more marks")/("total number of students")` = `(16 + 4)/(80) = (20)/(80) = (1)/(4)` . (iii) P(The student gets less than 45 marks ) = `("number of students getting less than 45 marks")/("total number of students")` `= (6 + 13 + 17)/(80) = (36)/(80)= (9)/(20)` .

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The table given below shows the marks obtained by 80 students of a class in a test with maximum marks 100 . A student of the class is selected at random . Find the probability that he gets (i) less than 15% marks , (ii) 60 or more marks and (iii) less than 45 marks .

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