Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
28th September 2010
- 1Conditional Probability3 marks
27 students study Spanish and 12 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 2Capture Recapture3 marks
30 fish are marked and released. Later 33 are caught, of which 3 are marked. Estimate the population.
- 3The Product Rule for Counting3 marks
A code is 3 letters (A to Z) followed by 3 digits (0 to 9), and repeats are allowed. How many codes are possible?
- 4Drawing Quadratic Graphs2 marks
For the curve y = x^2 + 7x - 3, work out y when x = 1.
- 5Writing a Ratio as a Fraction or Linear Function2 marks
x : y = 4 : 9. Write y in terms of x.
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