Higher
5th October 1988
- 1Conditional Probability3 marks
30 students study Spanish and 12 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 2Cumulative Frequency2 marks
Four classes in order have frequencies 6, 3, 8, 8. Write down the cumulative frequency at the end of the third class.
- 3Surds2 marks
Write sqrt(27) in the form a sqrt(b), where b is as small as possible.
- 4Quadratic Formula3 marks
Use the quadratic formula to solve 3x^2 - 3x - 1 = 0, to 2 decimal places.
- 5Speed and Density2 marks
A block has volume 35 cm^3 and density 3 g/cm^3. Work out its mass.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of October 1988, including the monthly compilation PDF.