Higher
9th January 1989
- 1Conditional Probability3 marks
29 students study Spanish and 11 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?
- 3Recurring Decimals to Fractions3 marks
Write the recurring decimal 0.5959... as a fraction in its simplest form.
- 4Quadratic Formula3 marks
Use the quadratic formula to solve 2x^2 + 8x - 8 = 0, to 2 decimal places.
- 5Repeated Percentage Change3 marks
A price rises by 20% and then falls by 25%. 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 1989, including the monthly compilation PDF.