Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
27th November 2010
- 1Conditional Probability3 marks
15 students study Spanish and 4 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 2Box Plots2 marks
A box plot has minimum 4, lower quartile 8, median 10, upper quartile 17 and maximum 25. Work out the interquartile range.
- 3Reverse Percentages3 marks
A bill is £648 including VAT at 20%. Work out the amount before VAT.
- 4Solving Quadratics3 marks
Solve x^2 + 3x - 10 = 0.
- 5Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 5, y = 75. Work out y when x = 7.
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