Higher
8th August 1990
- 1Conditional Probability3 marks
19 students study Spanish and 10 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 7, 7, 11, 4. Write down the cumulative frequency at the end of the third class.
- 3Bounds2 marks
A mass is 620 kg, correct to the nearest 10. Write down the upper bound.
- 4Quadratic Formula3 marks
Use the quadratic formula to solve 4x^2 - 11x - 10 = 0, to 2 decimal places.
- 5Speed and Density2 marks
A block has volume 35 cm^3 and density 4 g/cm^3. Work out its mass.
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