Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
22nd September 2010
- 1Probability Trees3 marks
4 of 6 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 2Cumulative Frequency2 marks
Four classes in order have frequencies 6, 12, 5, 3. Write down the cumulative frequency at the end of the third class.
- 3Reverse Percentages3 marks
A bill is £888 including VAT at 20%. Work out the amount before VAT.
- 4Simultaneous Equations3 marks
4 teas and 4 cakes cost £10.20. 3 teas and 5 cakes cost £11.05. Find the price of a tea.
- 5Speed and Density2 marks
A block has volume 95 cm^3 and density 7.5 g/cm^3. Work out its mass.
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