Higher
26th December 1980
- 1Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 2, y = 6. Work out y when x = 4.
- 2Perpendicular Lines and the equation of a tangent2 marks
A line has gradient -2. Work out the gradient of a line perpendicular to it.
- 3Conditional Probability3 marks
10 students study Spanish and 5 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 4Capture Recapture2 marks
A capture-recapture estimate is made of the fish population of a pond. State one assumption the method relies on.
- 5The Product Rule for Counting3 marks
A code is 2 letters (A to Z) followed by 3 digits (0 to 9), and repeats are allowed. How many codes are possible?
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Any date always gives the same five questions, so a sheet can be set again or shared. All of December 1980, including the monthly compilation PDF.