Higher
6th September 1983
- 1Writing a Ratio as a Fraction or Linear Function2 marks
x : y = 3 : 7. Write y in terms of x.
- 2Similar Shapes (Area and Volume)3 marks
Two similar shapes have lengths in the ratio 1 : 5. The smaller has an area of 3 cm^2. Work out the area of the larger.
- 3Conditional Probability3 marks
23 students study Spanish and 10 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 4Capture Recapture3 marks
60 voles are marked and released. Later 48 are caught, of which 6 are marked. Estimate the population.
- 5Reverse Percentages3 marks
A bill is £504 including VAT at 20%. Work out the amount before VAT.
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