Higher Plus
27th December 1970
- 1Probability Equation Questions3 marks
A bag holds 2 red and n blue counters. The probability of taking a red is 2/7. Work out n.
- 2Histograms3 marks
A histogram has four 10-wide classes from 0, with frequency densities 0.5, 2, 1, 3. Which class contains the median?
- 3Bounds3 marks
x = 108 and y = 62, each correct to the nearest whole number. Work out the upper bound of x - y.
- 4Iteration3 marks
Use the iteration x(n+1) = cube root of (5x(n) + 9) with x(0) = 1. Work out x(1) to 3 decimal places.
- 5Direct and Inverse Proportion Depth3 marks
y is directly proportional to sqrt(x). When x = 49, y = 63. Work out y when x = 16.
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