Daily Practice - Higher
27th September 1993
- 1Probability Trees3 marks
6 of 8 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 108 values. What cumulative frequency do you read across from to estimate the lower quartile?
- 3Reverse Percentages3 marks
A bill is £960 including VAT at 20%. Work out the amount before VAT.
- 4Equation of a Line3 marks
A line has gradient 3 and passes through (2, 12). Work out its equation.
- 5Repeated Percentage Change3 marks
A price rises by 20% and then falls by 25%. 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 September 1993, including the monthly compilation PDF.