Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
11th April 2008
- 1Conditional Probability3 marks
15 students study Spanish and 9 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 2Capture Recapture2 marks
A capture-recapture estimate is made of the newt population of a stream. State one assumption the method relies on.
- 3Surds2 marks
Write sqrt(27) in the form a sqrt(b), where b is as small as possible.
- 4Solving Quadratics3 marks
Solve x^2 - 2x - 63 = 0.
- 5Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 7, y = 21. Work out y when x = 3.
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