Daily Practice

Higher Plus

24th January 1985

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

1
Conditional Probability3 marks
A bag holds 3 red, 3 blue and 6 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 50 < x <= 60 has a frequency density of 2.4. How many values are in that class?
3
Surds3 marks
Simplify sqrt(48) + sqrt(108), giving your answer in the form a sqrt(b).
4
Quadratic Inequalities3 marks
Solve x^2 + 3x - 4 > 0.
5
Velocity Time Graphs2 marks
A train slows steadily from 26 m/s to rest in 4 seconds. Work out its deceleration.

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