Daily Practice

Higher Plus

3rd November 1978

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

1
Probability Equation Questions3 marks
A bag holds 7 counters, r of them red. Two are taken without replacement and P(both red) = 1/21. Work out r.
2
Histograms3 marks
A histogram has four 10-wide classes from 0, with frequency densities 2, 3, 0.5, 1. Which class contains the median?
3
Surds3 marks
Rationalise the denominator of 99/sqrt(11), giving your answer in its simplest form.
4
Transforming Graphs y=f(x)3 marks
The point (-6, 5) lies on y = f(x). Write down its image on y = f(x + 4).
5
Direct and Inverse Proportion Depth3 marks
y is inversely proportional to x^2. When x = 3, y = 12. Work out y when x = 2.

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