Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
- 1Conditional Probability3 marks
16 students study Spanish and 3 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 moth population of a meadow. State one assumption the method relies on.
- 3Reverse Percentages3 marks
A bill is £768 including VAT at 20%. Work out the amount before VAT.
- 4Drawing Quadratic Graphs2 marks
For the curve y = x^2 - 5x - 7, work out y when x = -3.
- 5Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 4, y = 36. Work out y when x = 8.
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