Higher
2nd April 1955
- 1Conditional Probability3 marks
27 students study Spanish and 8 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 9, lower quartile 16, median 21, upper quartile 25 and maximum 27. Work out the interquartile range.
- 3Reverse Percentages3 marks
A bill is £264 including VAT at 20%. Work out the amount before VAT.
- 4Quadratic Formula3 marks
Use the quadratic formula to solve 3x^2 + 7x - 10 = 0, to 2 decimal places.
- 5Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 3, y = 18. 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 April 1955, including the monthly compilation PDF.