Higher
18th December 1974
- 1Conditional Probability3 marks
20 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 4, 4, 5, 3. Write down the cumulative frequency at the end of the third class.
- 3The Product Rule for Counting3 marks
A code is 3 letters (A to Z) followed by 2 digits (0 to 9), and repeats are allowed. How many codes are possible?
- 4Quadratic Formula3 marks
Use the quadratic formula to solve 2x^2 - 12x - 6 = 0, to 2 decimal places.
- 5Speed and Density2 marks
A block has volume 60 cm^3 and density 7.5 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 December 1974, including the monthly compilation PDF.