Daily Practice · Higher
Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
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9th November 2010
- 1Probability Trees3 marks
5 of 9 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 2Capture Recapture3 marks
30 beetles are marked and released. Later 27 are caught, of which 3 are marked. Estimate the population.
- 3Fractional and Negative Indices2 marks
Write 4^-2 as a fraction.
- 4Simultaneous Equations3 marks
2 teas and 4 cakes cost £14.80. 4 teas and 5 cakes cost £20.75. Find the price of a tea.
- 5Writing a Ratio as a Fraction or Linear Function2 marks
x : y = 3 : 4. Write y in terms of x.
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