Daily Practice

Higher Plus

17th January 1991

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

1
Conditional Probability3 marks
A bag holds 10 red and 3 blue counters. Two are taken without replacement. Given the first was red, what is the probability the second is blue?
2
Histograms3 marks
On a histogram the bar for 20 < x <= 40 has a frequency density of 3.5. How many values are in that class?
3
Surds3 marks
Simplify sqrt(20) + sqrt(125), giving your answer in the form a sqrt(b).
4
Factorising Harder Quadratics3 marks
Solve 4x^2 - 16x + 15 = 0.
5
Velocity Time Graphs2 marks
A train slows steadily from 28 m/s to rest in 4 seconds. Work out its deceleration.

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