Higher
29th April 1991
- 1Conditional Probability3 marks
23 students study Spanish and 7 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 108 values. What cumulative frequency do you read across from to estimate the lower quartile?
- 3Bounds2 marks
A mass is 590 kg, correct to the nearest 10. Write down the upper bound.
- 4Solving Quadratics3 marks
Solve x^2 + 5x - 6 = 0.
- 5Repeated Percentage Change3 marks
A price rises by 10% 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 April 1991, including the monthly compilation PDF.