Higher
8th February 1988
- 1Conditional Probability3 marks
17 students study Spanish and 12 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 180 values. What cumulative frequency do you read across from to estimate the lower quartile?
- 3Standard Form2 marks
Work out (9 x 10^5) x (4 x 10^-6). Give your answer in standard form.
- 4Quadratic Formula3 marks
Use the quadratic formula to solve x^2 + x - 4 = 0, to 2 decimal places.
- 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 February 1988, including the monthly compilation PDF.