Higher
22nd June 1968
- 1Probability Trees3 marks
7 of 10 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 14, lower quartile 17, median 20, upper quartile 29 and maximum 36. Work out the interquartile range.
- 3Standard Form3 marks
Work out (18 x 10^6) / (2 x 10^4). Give your answer in standard form.
- 4Trigonometric and Exponential Graphs2 marks
The curve y = 2^x is drawn. Work out y when x = 5, and write down where the curve crosses the y-axis.
- 5Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 3, y = 45. Work out y when x = 7.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of June 1968, including the monthly compilation PDF.