Higher
25th February 1971
- 1Conditional Probability3 marks
22 students study Spanish and 10 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 2Histograms2 marks
A histogram class is 10 units wide and contains 5 values. Work out the frequency density.
- 3Reverse Percentages3 marks
A bill is £384 including VAT at 20%. Work out the amount before VAT.
- 4Quadratic Formula3 marks
Use the quadratic formula to solve x^2 - 9x + 3 = 0, to 2 decimal places.
- 5Repeated Percentage Change3 marks
A town's population is 5500 and grows by 8% each year. Work out the population after 4 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 February 1971, including the monthly compilation PDF.