Higher
5th December 1981
- 1Conditional Probability3 marks
16 students study Spanish and 6 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 13, lower quartile 21, median 29, upper quartile 33 and maximum 40. Work out the interquartile range.
- 3Bounds2 marks
A mass is 19.3 kg, correct to 1 decimal place. Write down the upper bound.
- 4Quadratic Formula3 marks
Use the quadratic formula to solve x^2 - 4x + 2 = 0, to 2 decimal places.
- 5Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 3, y = 54. Work out y when x = 5.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of December 1981, including the monthly compilation PDF.