Daily Practice

Higher Plus

29th May 1984

5 questions · 14 marks · Grades 8-9 · 51 question types in this band

1
Conditional Probability3 marks
A bag holds 3 red, 7 blue and 2 green counters. Two are taken without replacement. Given neither is green, what is the probability both are red?
2
Histograms3 marks
On a histogram the bar for 10 < x <= 30 has a frequency density of 1.2. How many values are in that class?
3
Surds3 marks
Expand and simplify (5 + sqrt(10))(5 - sqrt(10)).
4
The Nth Term of a Quadratic Sequence3 marks
Work out the nth term of the quadratic sequence 2, 2, 4, 8, ...
5
Velocity Time Graphs2 marks
A train slows steadily from 29 m/s to rest in 10 seconds. Work out its deceleration.

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