Higher
14th February 1991
- 1Repeated Percentage Change3 marks
A town's population is 23500 and grows by 3% each year. Work out the population after 5 years, to the nearest whole number.
- 2Vectors3 marks
a is the column vector (6, -3) and b is (3, 1). Work out 5a - 5b as a column vector.
- 3Probability Trees3 marks
1 of 5 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 4Histograms2 marks
A histogram class is 5 units wide and contains 2.5 values. Work out the frequency density.
- 5Standard Form3 marks
Work out (64 x 10^9) / (8 x 10^5). Give your answer in standard form.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of February 1991, including the monthly compilation PDF.