Higher
1st November 1975
- 1Probability Trees3 marks
2 of 9 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 13, lower quartile 18, median 26, upper quartile 34 and maximum 38. Work out the interquartile range.
- 3Recurring Decimals to Fractions3 marks
Write the recurring decimal 0.1313... as a fraction in its simplest form.
- 4Trigonometric and Exponential Graphs2 marks
The curve y = 3^x is drawn. Work out y when x = 3, 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 = 6, y = 108. Work out y when x = 4.
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