Higher
10th January 1990
- 1Probability Trees3 marks
1 of 7 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 2Cumulative Frequency2 marks
Four classes in order have frequencies 11, 9, 4, 5. Write down the cumulative frequency at the end of the third class.
- 3Surds2 marks
Write sqrt(75) in the form a sqrt(b), where b is as small as possible.
- 4Trigonometric and Exponential Graphs2 marks
The curve y = 6^x is drawn. Work out y when x = 3, and write down where the curve crosses the y-axis.
- 5Speed and Density2 marks
A block has volume 50 cm^3 and density 11 g/cm^3. Work out its mass.
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