Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
16th December 2020
- 1Conditional Probability3 marks
14 students study Spanish and 3 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 2Cumulative Frequency2 marks
Four classes in order have frequencies 8, 7, 9, 8. Write down the cumulative frequency at the end of the third class.
- 3Bounds2 marks
A mass is 6.2 kg, correct to 1 decimal place. Write down the upper bound.
- 4Quadratic Formula3 marks
Work out the discriminant of 3x^2 + 11x + 12 = 0 and say how many real solutions it has.
- 5Speed and Density2 marks
A block has volume 100 cm^3 and density 4 g/cm^3. Work out its mass.
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