Higher
16th September 1981
- 1Speed and Density2 marks
A block has volume 85 cm^3 and density 3 g/cm^3. Work out its mass.
- 2Similar Shapes (Area and Volume)3 marks
Two similar shapes have lengths in the ratio 1 : 2. The smaller has an area of 13 cm^2. Work out the area of the larger.
- 3Conditional Probability3 marks
15 students study Spanish and 11 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 4Cumulative Frequency2 marks
Four classes in order have frequencies 11, 6, 7, 6. Write down the cumulative frequency at the end of the third class.
- 5The Product Rule for Counting3 marks
A code is 3 letters (A to Z) followed by 3 digits (0 to 9), and repeats are allowed. How many codes are possible?
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