Daily Practice · Higher

Daily Practice - Higher

Grades 6-7 - Higher-tier method and manipulation.

18th August 2011

5 questions · 14 marks · Grades 6-7 · 61 question types in this band

1
Conditional Probability3 marks
26 students study Spanish and 12 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
2
Histograms2 marks
A histogram class is 5 units wide and contains 15 values. Work out the frequency density.
3
Reverse Percentages3 marks
A bill is £120 including VAT at 20%. Work out the amount before VAT.
4
Quadratic Formula3 marks
Work out the discriminant of 3x^2 - 4x + 10 = 0 and say how many real solutions it has.
5
Repeated Percentage Change3 marks
A town's population is 9500 and grows by 6% each year. Work out the population after 6 years, to the nearest whole number.

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