Daily Practice
Higher
← All tiers
31st July 1979
- 1Probability Trees3 marks
6 of 10 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 2Capture Recapture3 marks
10 newts are marked and released. Later 24 are caught, of which 4 are marked. Estimate the population.
- 3Bounds2 marks
A mass is 190 kg, correct to the nearest 10. Write down the lower bound.
- 4Simultaneous Equations3 marks
5 teas and 3 cakes cost £17.95. 1 tea and 4 cakes cost £14.30. Find the price of a tea.
- 5Writing a Ratio as a Fraction or Linear Function2 marks
x : y = 7 : 9. Write y in terms of x.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of July 1979, including the monthly compilation PDF.