Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
19th November 2016
- 1Conditional Probability3 marks
29 students study Spanish and 11 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 9, lower quartile 19, median 23, upper quartile 33 and maximum 38. Work out the interquartile range.
- 3The Product Rule for Counting3 marks
A code is 3 letters (A to Z) followed by 4 digits (0 to 9), and repeats are allowed. How many codes are possible?
- 4Quadratic Formula3 marks
Use the quadratic formula to solve x^2 + 8x + 7 = 0, to 2 decimal places.
- 5Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 6, y = 180. Work out y when x = 9.
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