Daily Practice
Higher
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3rd March 1987
- 1Probability Trees3 marks
3 of 5 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 2Capture Recapture3 marks
55 newts are marked and released. Later 12 are caught, of which 2 are marked. Estimate the population.
- 3Bounds2 marks
A mass is 22 kg, correct to 1 decimal place. Write down the lower bound.
- 4Equation of a Line3 marks
A line has gradient -3 and passes through (6, -20). Work out its equation.
- 5Writing a Ratio as a Fraction or Linear Function2 marks
x : y = 3 : 7. 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 March 1987, including the monthly compilation PDF.