Daily Practice
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10th April 1990
- 1Conditional Probability3 marks
18 students study Spanish and 10 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 2Capture Recapture3 marks
20 beetles are marked and released. Later 16 are caught, of which 4 are marked. Estimate the population.
- 3Standard Form2 marks
Work out (8 x 10^3) x (4 x 10^3). Give your answer in standard form.
- 4Solving Quadratics3 marks
Solve x^2 - 7x - 18 = 0.
- 5Writing a Ratio as a Fraction or Linear Function2 marks
x : y = 3 : 5. Write y in terms of x.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of April 1990, including the monthly compilation PDF.