Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
7th November 2018
- 1Speed and Density2 marks
A block has volume 90 cm^3 and density 3 g/cm^3. Work out its mass.
- 2Vectors3 marks
a is the column vector (-4, 4) and b is (-2, 1). Work out 3a - 3b as a column vector.
- 3Probability 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.
- 4Cumulative Frequency2 marks
Four classes in order have frequencies 10, 9, 9, 8. Write down the cumulative frequency at the end of the third class.
- 5Bounds2 marks
A mass is 30 kg, correct to the nearest whole number. Write down the lower bound.
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