Higher Plus
27th October 1988
- 1Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^3. When x = 3, y = 108. Work out y when x = 5.
- 2Vectors Proof Questions3 marks
OACB is a parallelogram with vector OA = a and vector OB = p. X is the point dividing AB in the ratio 1 : 2. Write vector OX in terms of a and p.
- 3Probability Equation Questions3 marks
The probability of winning a game is 9/10. A player expects 126 wins. How many games did they play?
- 4Histograms3 marks
On a histogram the bar for 60 < x <= 70 has a frequency density of 1.2. How many values are in that class?
- 5Surds3 marks
Simplify sqrt(48) + sqrt(108), giving your answer in the form a sqrt(b).
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