Daily Practice
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23rd October 1987
- 1Conditional Probability3 marks
18 students study Spanish and 3 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 2Capture Recapture2 marks
A capture-recapture estimate is made of the fish population of a pond. State one assumption the method relies on.
- 3Standard Form3 marks
Work out (18 x 10^11) / (6 x 10^5). Give your answer in standard form.
- 4Inequalities on Graphs3 marks
Does the point (0, -7) satisfy y > 3x - 6?
- 5Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 7, y = 56. Work out y when x = 15.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of October 1987, including the monthly compilation PDF.