Apps. and Interpretation for IBDP Maths Ebook 1 | Page 248

Your Practice Set – Applications and Interpretation for IBDP Mathematics
The student is awarded 5 learning points per dollar for the first 15 dollars raised, and 10
learning points per dollar for each dollar they raised after the first 15 dollars.
(b)
Find the number of learning points a student is awarded for raising
(i)
15 dollars;
(ii) 20 dollars.
[4]
(c) Find the number of students who is awarded greater than or equal to 62.5 learning
points.
[3]
(d) 80 students are awarded more than k learning points. Find the value of k .
[4]
The data above was obtained from a survey. The chairman of the student union randomly
chooses 120 students to take the survey from the whole 700 students in the school.
(e)
Identify the sampling technique used.
[1]
2. The following cumulative frequency diagram shows the lengths of 200 fish, in cm.
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