Daily Practice
Higher
← All tiers
21st January 1972
- 1Probability Trees3 marks
5 of 10 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 2Capture Recapture2 marks
A capture-recapture estimate is made of the fish population of a pond. State one assumption the method relies on.
- 3Reverse Percentages3 marks
A bill is £96 including VAT at 20%. Work out the amount before VAT.
- 4Equation of a Line3 marks
A line has gradient -2 and passes through (6, -5). Work out its equation.
- 5Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 3, y = 12. Work out y when x = 13.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of January 1972, including the monthly compilation PDF.