Daily Practice · Higher Plus

Daily Practice - Higher Plus

11th July 1993

5 questions · 15 marks · Grades 8-9 · 51 question types in this band

1
Conditional Probability3 marks
A bag holds 5 red, 6 blue and 6 green counters. Two are taken without replacement. Given neither is green, what is the probability both are red?
2
Histograms3 marks
A histogram has four 10-wide classes from 0, with frequency densities 2, 1, 3, 0.5. Which class contains the median?
3
Bounds3 marks
x = 71 and y = 19, each correct to the nearest whole number. Work out the upper bound of x - y.
4
Rearranging Harder Formulae3 marks
Make x the subject of 2x + 4 = y(x + 4).
5
Direct and Inverse Proportion Depth3 marks
y is directly proportional to sqrt(x). When x = 4, y = 6. Work out y when x = 16.

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