Question

The marks of 80 students in Maths (out of 80) were recorded as follows:
Marks
0-20 21-30 40-60 61-80
Number of students 18 19 23 T 20
It the passing marks are 50% then find the probability that the student
chosen at random:
(1) got the passing marks
(11) failed to get the passing marks
(iii) got below 21 marks.

Answer 1

here's the answer ...it's easy...........