Daily Practice
Higher Plus
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9th December 1970
- 1Conditional Probability3 marks
A bag holds 3 red, 6 blue and 3 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 40 < x <= 45 has a frequency density of 1.2. How many values are in that class?
- 3Bounds3 marks
A rectangle is 9 cm by 8 cm, each correct to the nearest cm. Work out the upper bound of its area.
- 4Factorising Harder Quadratics3 marks
Solve 6x^2 + 5x - 4 = 0.
- 5Velocity Time Graphs2 marks
A train slows steadily from 31 m/s to rest in 4 seconds. Work out its deceleration.
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