Daily Practice · Higher
Daily Practice - Higher
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19th April 1994
- 1Probability Trees3 marks
3 of 10 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 2Capture Recapture3 marks
30 newts are marked and released. Later 32 are caught, of which 4 are marked. Estimate the population.
- 3The Product Rule for Counting3 marks
A code is 3 letters (A to Z) followed by 2 digits (0 to 9), and repeats are allowed. How many codes are possible?
- 4Simultaneous Equations3 marks
3 teas and 3 cakes cost £15.75. 2 teas and 3 cakes cost £13.35. Find the price of a tea.
- 5Writing a Ratio as a Fraction or Linear Function2 marks
x : y = 4 : 7. Write y in terms of x.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of April 1994, including the monthly compilation PDF.