Question

(b) In a Mathematics test, 90 students obtained (out of 100) the marks given in the following table :
[3]
Marks
No. of Students
1-20
8
21 - 40
12
41 – 50
18
51 - 60
20
61 - 70
71 - 80
17
81 - 90
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.
13​

Answer 1

less than 41 marks =

total no. of outcomes : 90

no. of favorable outcomes : 20/90 or 2/9

more than 50 marks = 67/90

between 41 and 80 = 28/90

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Answer 2

Answer:

2/9

31/45

34/45

Step-by-step explanation:

total number of outcome=90

I)12+8 students got below 41

so probability=20/90=2/9

ll)62 students got more than 50

so probability=62/90=31/45

lll)68 students got marks between 41 and 80

so probability=68/90=34/45

....pls mark as brainlist