Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
24th September 2008
- 1Speed and Density2 marks
A block has volume 95 cm^3 and density 11 g/cm^3. Work out its mass.
- 2Vectors3 marks
a is the column vector (2, 6) and b is (-3, 4). Work out 3a - 2b as a column vector.
- 3Probability Trees3 marks
3 of 7 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 4Cumulative Frequency2 marks
Four classes in order have frequencies 8, 12, 4, 3. Write down the cumulative frequency at the end of the third class.
- 5Bounds2 marks
A mass is 52 kg, correct to the nearest whole number. Write down the upper bound.
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