Daily Practice
Higher Plus
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3rd August 1975
- 1Probability Equation Questions3 marks
A bag holds 5 red and n blue counters. The probability of taking a red is 5/11. Work out n.
- 2Histograms3 marks
A histogram has four 10-wide classes from 0, with frequency densities 0.5, 1, 2, 3. Which class contains the median?
- 3Bounds3 marks
x = 47 and y = 34, each correct to the nearest whole number. Work out the upper bound of x - y.
- 4Completing the Square3 marks
Write x^2 - 12x - 9 in the form (x + a)^2 + b.
- 5Direct and Inverse Proportion Depth3 marks
y is directly proportional to sqrt(x). When x = 36, y = 36. Work out y when x = 64.
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