Question

4. The following table shows the marks scored by 100 students in a Mathematics
test of 80 marks:

Marks
0 - 2020 -30 30-40 40-50 50-60 60 - 7070 - 80
No. of students 7 10 20 20 20 15
a) Find the probability that a student obtained:
i. Less than 20 marks.
11. 60 or more marks.


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Answer 1

Answer:

1. 7÷100×10

= 0.7

2. 15+8=23

= 23÷100×10

= 2.3