Daily Practice
Higher Plus
← All tiers
9th March 1988
- 1Conditional Probability3 marks
A bag holds 4 red, 5 blue and 5 green counters. Two are taken without replacement. Given neither is green, what is the probability both are red?
- 2Histograms3 marks
On a histogram the bar for 30 < x <= 40 has a frequency density of 2.4. How many values are in that class?
- 3Bounds3 marks
A rectangle is 8 cm by 11 cm, each correct to the nearest cm. Work out the upper bound of its area.
- 4Algebraic Fractions3 marks
Simplify (x^2 - 3x - 18)/(x - 6).
- 5Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^3. When x = 2, y = 16. Work out y when x = 4.
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