Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
21st December 2002
- 1Probability Trees3 marks
2 of 5 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 2Box Plots2 marks
A box plot has minimum 6, lower quartile 16, median 22, upper quartile 27 and maximum 32. Work out the interquartile range.
- 3The Product Rule for Counting3 marks
A code is 2 letters (A to Z) followed by 3 digits (0 to 9), and repeats are allowed. How many codes are possible?
- 4Simultaneous Equations3 marks
5 teas and 3 cakes cost £20.60. 2 teas and 5 cakes cost £19.45. Find the price of a tea.
- 5Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 2, y = 24. Work out y when x = 6.
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