Higher
7th January 1989
- 1Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 2, y = 32. Work out y when x = 7.
- 2Vectors3 marks
a is the column vector (-2, -6) and b is (2, 0). Work out 4a - 3b as a column vector.
- 3Probability Trees3 marks
5 of 8 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 4Box Plots2 marks
A box plot has minimum 3, lower quartile 13, median 20, upper quartile 23 and maximum 30. Work out the interquartile range.
- 5The Product Rule for Counting2 marks
A meal deal has 8 mains, 8 sides and 4 drinks. How many different meals are possible?
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Any date always gives the same five questions, so a sheet can be set again or shared. All of January 1989, including the monthly compilation PDF.