Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
29th October 2011
- 1Conditional Probability3 marks
19 students study Spanish and 3 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 8, lower quartile 15, median 22, upper quartile 26 and maximum 35. Work out the interquartile range.
- 3The Product Rule for Counting3 marks
A code is 2 letters (A to Z) followed by 2 digits (0 to 9), and repeats are allowed. How many codes are possible?
- 4Solving Quadratics3 marks
Solve x^2 + 8x + 7 = 0.
- 5Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 5, y = 125. Work out y when x = 3.
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