Higher Plus
27th August 1967
- 1Conditional Probability3 marks
A bag holds 4 red, 6 blue and 2 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 20 < x <= 40 has a frequency density of 0.4. How many values are in that class?
- 3Bounds3 marks
x = 115 and y = 50, each correct to the nearest whole number. Work out the upper bound of x - y.
- 4The Nth Term of a Quadratic Sequence3 marks
Work out the nth term of the quadratic sequence 10, 21, 38, 61, ...
- 5Velocity Time Graphs2 marks
A train slows steadily from 32 m/s to rest in 5 seconds. Work out its deceleration.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of August 1967, including the monthly compilation PDF.