Daily Practice
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7th April 1970
- 1Conditional Probability3 marks
17 students study Spanish and 7 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 2Capture Recapture3 marks
40 newts are marked and released. Later 70 are caught, of which 7 are marked. Estimate the population.
- 3The Product Rule for Counting3 marks
A code is 3 letters (A to Z) followed by 2 digits (0 to 9), and repeats are allowed. How many codes are possible?
- 4Drawing Quadratic Graphs2 marks
For the curve y = x^2 - 7x - 12, work out y when x = 5.
- 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 April 1970, including the monthly compilation PDF.