Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
22nd November 2011
- 1Conditional Probability3 marks
19 students study Spanish and 12 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 2Capture Recapture3 marks
30 newts are marked and released. Later 35 are caught, of which 5 are marked. Estimate the population.
- 3Surds2 marks
Write sqrt(75) in the form a sqrt(b), where b is as small as possible.
- 4Quadratic Formula3 marks
Use the quadratic formula to solve x^2 - 5x + 6 = 0, to 2 decimal places.
- 5Writing a Ratio as a Fraction or Linear Function2 marks
x : y = 4 : 7. Write y in terms of x.
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