Higher
30th January 1984
- 1Probability Trees3 marks
4 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?
- 3The Product Rule for Counting2 marks
A meal deal has 5 mains, 3 sides and 3 drinks. How many different meals are possible?
- 4Factorising Harder Quadratics3 marks
Factorise 8x^2 - 22x + 15.
- 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 January 1984, including the monthly compilation PDF.