Daily Practice

Higher Plus

26th August 1990

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

1
Conditional Probability3 marks
A bag holds 5 red, 3 blue and 3 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 40 < x <= 50 has a frequency density of 2.4. How many values are in that class?
3
Bounds3 marks
x = 151 and y = 29, each correct to the nearest whole number. Work out the upper bound of x - y.
4
Quadratic Inequalities3 marks
Solve x^2 - 9 < 0.
5
Velocity Time Graphs2 marks
A train slows steadily from 22 m/s to rest in 10 seconds. Work out its deceleration.

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