Question

6) In a Mathematics test, 90 students obtained (out of 100) the marks given in the following table:
[3]
No. of Students
8
12
18
Marks
1-20
21 - 40
41 - 50
51 - 60
61 - 70
71 - 80
81-90
20
13
17
12
Find the probability :
(i) a student obtained less than 41.
(ii) a student obtained more than 50.
(iii) a student obtained between 41 and 80.​

Answer 1

Answer:

a)20/100

b)62/100

c)68/100