Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
18th October 2013
- 1Conditional Probability3 marks
28 students study Spanish and 8 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 snail population of a hedgerow. State one assumption the method relies on.
- 3Reverse Percentages3 marks
A bill is £72 including VAT at 20%. Work out the amount before VAT.
- 4Solving Quadratics3 marks
Solve x^2 + 2x - 48 = 0.
- 5Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 6, y = 72. Work out y when x = 3.
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