Daily Practice

Higher Plus

25th November 1983

5 questions · 15 marks · Grades 8-9 · 51 question types in this band

1
Conditional Probability3 marks
A bag holds 6 red and 4 blue counters. Two are taken without replacement. Given the first was red, what is the probability the second is blue?
2
Histograms3 marks
A histogram has four 20-wide classes from 0, with frequency densities 1, 3, 0.5, 2. Which class contains the median?
3
Surds3 marks
Rationalise the denominator of 12/sqrt(3), giving your answer in its simplest form.
4
Inverse and Composite Functions3 marks
f(x) = 4x + 3 and g(x) = 6x + 2. Work out fg(-1).
5
Direct and Inverse Proportion Depth3 marks
y is inversely proportional to x^2. When x = 4, y = 50. Work out y when x = 5.

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