Daily Practice

Higher

12th June 1986

5 questions · 13 marks · Grades 6-7 · 61 question types in this band

1
Probability Trees3 marks
2 of 10 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
2
Histograms2 marks
A histogram class is 20 units wide and contains 80 values. Work out the frequency density.
3
Bounds2 marks
A mass is 19 kg, correct to the nearest whole number. Write down the lower bound.
4
Factorising Harder Quadratics3 marks
Factorise 9x^2 - 12x - 5.
5
Repeated Percentage Change3 marks
A town's population is 24500 and grows by 5% each year. Work out the population after 5 years, to the nearest whole number.

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