Higher
26th June 1981
- 1Probability Trees3 marks
5 of 9 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 2Capture Recapture2 marks
A capture-recapture estimate is made of the snail population of a hedgerow. State one assumption the method relies on.
- 3Standard Form3 marks
Work out (6 x 10^11) / (2 x 10^2). Give your answer in standard form.
- 4Trigonometric and Exponential Graphs2 marks
The curve y = 2^x is drawn. Work out y when x = 1, and write down where the curve crosses the y-axis.
- 5Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 6, y = 54. Work out y when x = 5.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of June 1981, including the monthly compilation PDF.