Higher Plus
30th November 1975
- 1Vectors Proof Questions3 marks
In a vector proof you find that vector PQ = a - 2b and vector RS = 3a - 6b. What does this show about PQ and RS?
- 2Probability Equation Questions3 marks
The probability of winning a game is 9/10. A player expects 108 wins. How many games did they play?
- 3Histograms2 marks
On a histogram, a 10-wide bar and a 40-wide bar have the same frequency density of 1.5. How many more values are in the wider class?
- 4Bounds3 marks
x = 173 and y = 23, each correct to the nearest whole number. Work out the upper bound of x - y.
- 5Completing the Square3 marks
Write x^2 - 14x - 10 in the form (x + a)^2 + b.
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