Higher
17th January 1983
- 1Conditional Probability3 marks
21 students study Spanish and 4 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 2Cumulative Frequency2 marks
A cumulative frequency graph is drawn for 192 values. What cumulative frequency do you read across from to estimate the lower quartile?
- 3Standard Form2 marks
Work out (7 x 10^6) x (6 x 10^4). Give your answer in standard form.
- 4Solving Quadratics3 marks
Solve x^2 - 2x + 1 = 0.
- 5Repeated Percentage Change3 marks
A price rises by 20% and then falls by 20%. Work out the overall percentage change, to 2 decimal places.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of January 1983, including the monthly compilation PDF.