Higher
20th September 1984
- 1Conditional Probability3 marks
22 students study Spanish and 11 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 2Histograms2 marks
A histogram class is 4 units wide and contains 8 values. Work out the frequency density.
- 3The Product Rule for Counting3 marks
A code is 3 letters (A to Z) followed by 4 digits (0 to 9), and repeats are allowed. How many codes are possible?
- 4Drawing Quadratic Graphs2 marks
For the curve y = x^2 + x - 10, work out y when x = -1.
- 5Repeated Percentage Change3 marks
A town's population is 30500 and grows by 3% each year. Work out the population after 4 years, to the nearest whole number.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of September 1984, including the monthly compilation PDF.