Higher
15th March 1972
- 1Conditional Probability3 marks
20 students study Spanish and 5 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 5, 6, 6, 12. Write down the cumulative frequency at the end of the third class.
- 3Standard Form2 marks
Work out (3 x 10^5) x (2 x 10^-5). Give your answer in standard form.
- 4Quadratic Formula3 marks
Use the quadratic formula to solve x^2 - 8x - 2 = 0, to 2 decimal places.
- 5Speed and Density2 marks
A block has volume 155 cm^3 and density 11 g/cm^3. Work out its mass.
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