Question

The marks obtained (out of 80 marks) by 40 students in a test of mathematics are given in the following table:


Marks obtained


0-20


20-30


30-40


40-50


50-60


60-70


70-80

No. of students
3
2
5
8
6
9
7

Find the probability of a student, chosen at random, getting
Less than 40 marks
50 or more marks ​

Answer 1

Answer:

0-20

Step-by-step explanation:

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