Higher
28th December 1972
- 1Conditional Probability3 marks
20 students study Spanish and 4 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 20 units wide and contains 60 values. Work out the frequency density.
- 3Standard Form3 marks
Work out (45 x 10^7) / (5 x 10^5). Give your answer in standard form.
- 4Quadratic Formula3 marks
Work out the discriminant of 2x^2 - 3x + 2 = 0 and say how many real solutions it has.
- 5Repeated Percentage Change3 marks
A town's population is 21500 and grows by 5% each year. Work out the population after 3 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 December 1972, including the monthly compilation PDF.