Daily Practice

Higher Plus

27th January 1989

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

1
Conditional Probability3 marks
A bag holds 4 red and 7 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 40 < x <= 45 has a frequency density of 1.5. How many values are in that class?
3
Surds3 marks
Rationalise the denominator of 21/sqrt(7), giving your answer in its simplest form.
4
Algebraic Fractions3 marks
Write 5/(x - 6) + 2/(x + 3) as a single fraction.
5
Velocity Time Graphs2 marks
A train slows steadily from 19 m/s to rest in 5 seconds. Work out its deceleration.

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