Higher Plus
1st March 1978
- 13d Pythagoras and Trigonometry3 marks
A cuboid measures 7 cm by 7 cm by 6 cm tall. Work out the angle between its longest internal diagonal and the base, to 1 decimal place.
- 2Conditional Probability3 marks
A bag holds 6 red and 4 blue counters. Two are taken without replacement. Given the first was red, what is the probability the second is blue?
- 3Histograms3 marks
A histogram has two bars: one 10 units wide with frequency density 1.5, one 5 units wide with density 3. How many values in total?
- 4Bounds3 marks
A rectangle is 20 cm by 13 cm, each correct to the nearest cm. Work out the upper bound of its area.
- 5Completing the Square3 marks
Work out the coordinates of the turning point of y = x^2 - 14x + 4.
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