Higher
24th January 1985
- 1Probability Trees3 marks
3 of 8 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 2 units wide and contains 8 values. Work out the frequency density.
- 3Reverse Percentages3 marks
A bill is £720 including VAT at 20%. Work out the amount before VAT.
- 4Equation of a Line3 marks
A line has gradient 2 and passes through (3, 15). Work out its equation.
- 5Repeated Percentage Change3 marks
A town's population is 21500 and grows by 4% each year. Work out the population after 5 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 1985, including the monthly compilation PDF.