Higher
6th January 1977
- 1Probability Trees3 marks
1 of 7 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 2Histograms2 marks
A histogram class is 5 units wide and contains 12.5 values. Work out the frequency density.
- 3Surds2 marks
Write sqrt(12) in the form a sqrt(b), where b is as small as possible.
- 4Trigonometric and Exponential Graphs2 marks
The curve y = 5^x is drawn. Work out y when x = 2, and write down where the curve crosses the y-axis.
- 5Repeated Percentage Change3 marks
A town's population is 29500 and grows by 5% each year. Work out the population after 3 years, to the nearest whole number.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of January 1977, including the monthly compilation PDF.