Higher
11th October 1980
- 1Conditional Probability3 marks
22 students study Spanish and 7 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 1, lower quartile 10, median 14, upper quartile 21 and maximum 26. Work out the interquartile range.
- 3Recurring Decimals to Fractions3 marks
Write the recurring decimal 0.555... as a fraction in its simplest form.
- 4Drawing Quadratic Graphs2 marks
For the curve y = x^2 + 4x - 3, work out y when x = 0.
- 5Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 2, y = 16. Work out y when x = 8.
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