Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
20th October 2015
- 1Conditional Probability3 marks
9 students study Spanish and 3 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 2Capture Recapture3 marks
10 voles are marked and released. Later 28 are caught, of which 4 are marked. Estimate the population.
- 3The Product Rule for Counting3 marks
A code is 2 letters (A to Z) followed by 3 digits (0 to 9), and repeats are allowed. How many codes are possible?
- 4Inequalities on Graphs3 marks
Does the point (2, -9) satisfy y > -x - 3?
- 5Writing a Ratio as a Fraction or Linear Function2 marks
x : y = 2 : 7. Write y in terms of x.
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