Higher Plus
23rd June 1987
- 1Velocity Time Graphs2 marks
A train slows steadily from 30 m/s to rest in 5 seconds. Work out its deceleration.
- 2The Cosine Rule3 marks
A triangle has sides of 7 cm and 8 cm with an angle of 103° between them. Work out the third side, to 1 decimal place.
- 3Conditional Probability3 marks
A bag holds 3 red, 7 blue and 5 green counters. Two are taken without replacement. Given neither is green, what is the probability both are red?
- 4Histograms3 marks
On a histogram the bar for 20 < x <= 25 has a frequency density of 0.4. How many values are in that class?
- 5Surds3 marks
Expand and simplify (3 + sqrt(3))(3 - sqrt(3)).
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Any date always gives the same five questions, so a sheet can be set again or shared. All of June 1987, including the monthly compilation PDF.