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2nd December 1977
- 1Conditional Probability3 marks
13 students study Spanish and 6 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 beetle population of a woodland. State one assumption the method relies on.
- 3Surds2 marks
Write sqrt(20) in the form a sqrt(b), where b is as small as possible.
- 4Solving Quadratics3 marks
Solve x^2 - 1 = 0.
- 5Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 7, y = 84. Work out y when x = 3.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of December 1977, including the monthly compilation PDF.