Question

(17) Following table shows the marks scored by a group of 90 students in a mathematics rest of 100 marks.
Marks:
0 - 20
20 - 30
30 - 40
40 - 50
50 - 60
60 - 70
70 - 100

Number of students:
7
10
10
20
20
15
8

Find the Probability that a student obtained:
(i) less than 20% marks (ii) 60 or more marks.​

Answer 1

Answer:

the 0-20 7 students have got since, 8 students have got 70-100 the answer is 70- 100 %