Higher
17th June 1985
- 1Probability Trees3 marks
2 of 6 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 2Cumulative Frequency2 marks
A cumulative frequency graph is drawn for 104 values. What cumulative frequency do you read across from to estimate the lower quartile?
- 3Standard Form3 marks
Work out (16 x 10^9) / (4 x 10^5). Give your answer in standard form.
- 4Equation of a Line3 marks
A line has gradient 3 and passes through (4, 11). Work out its equation.
- 5Repeated Percentage Change3 marks
A price rises by 10% and then falls by 15%. Work out the overall percentage change, to 2 decimal places.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of June 1985, including the monthly compilation PDF.