Higher
27th January 1972
- 1Conditional Probability3 marks
19 students study Spanish and 5 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?
- 4Quadratic Formula3 marks
Use the quadratic formula to solve 2x^2 - 7x - 3 = 0, to 2 decimal places.
- 5Repeated Percentage Change3 marks
A town's population is 25500 and grows by 5% each year. Work out the population after 2 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 January 1972, including the monthly compilation PDF.