Daily Practice - Higher Plus
6th January 1993
- 1Conditional Probability3 marks
A bag holds 8 red and 4 blue counters. Two are taken without replacement. Given the first was red, what is the probability the second is blue?
- 2Histograms3 marks
On a histogram the bar for 10 < x <= 30 has a frequency density of 2.4. How many values are in that class?
- 3Bounds3 marks
A rectangle is 4 cm by 11 cm, each correct to the nearest cm. Work out the upper bound of its area.
- 4Inverse and Composite Functions3 marks
f(x) = 5x + 9. Work out the inverse function f^-1(x).
- 5Velocity Time Graphs2 marks
A train slows steadily from 39 m/s to rest in 5 seconds. Work out its deceleration.
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