Analysis and Approaches for IBDP Maths Ebook 1 | Page 229

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.
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(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]
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