Higher
20th August 1990
- 1Conditional Probability3 marks
10 students study Spanish and 3 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 224 values. What cumulative frequency do you read across from to estimate the lower quartile?
- 3Standard Form2 marks
Work out (5 x 10^8) x (7 x 10^-2). Give your answer in standard form.
- 4Drawing Quadratic Graphs2 marks
For the curve y = x^2 + x - 6, work out y when x = 4.
- 5Repeated Percentage Change3 marks
A price rises by 25% and then falls by 15%. 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 August 1990, including the monthly compilation PDF.