Higher Plus
4th October 1956
- 1Proof of the Circle Theorems2 marks
In a circle theorem proof, a step uses the fact that two angles at the circumference stand on the same arc. State the reason being quoted.
- 2Probability Equation Questions3 marks
A bag holds 7 counters, r of them red. Two are taken without replacement and P(both red) = 1/7. Work out r.
- 3Histograms2 marks
On a histogram, a 4-wide bar and a 12-wide bar have the same frequency density of 2. How many more values are in the wider class?
- 4Surds3 marks
Simplify sqrt(48) + sqrt(147), giving your answer in the form a sqrt(b).
- 5Inverse and Composite Functions3 marks
f(x) = 3x - 11. Work out the inverse function f^-1(x).
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