Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
14th March 2010
- 1Probability Trees3 marks
6 of 9 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 a minimum of 6 and a maximum of 64. Work out the 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?
- 4Simultaneous Equations3 marks
2 teas and 3 cakes cost £10.95. 4 teas and 3 cakes cost £15.15. Find the price of a tea.
- 5Direct and Inverse Proportion3 marks
y is inversely proportional to x. When x = 5, y = 36. Work out y when x = 6.
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