Daily Practice
Foundation
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11th September 1979
- 1Probability (Higher)3 marks
A biased coin lands on heads with probability 0.1. It is thrown 100 times. How many heads would you expect?
- 2Frequency Trees3 marks
90 people were surveyed. 50 were adults, of whom 10 said yes. 20 of the children said yes. How many said yes altogether?
- 3Error Intervals2 marks
A number y is 89 when truncated to the nearest whole number. Write down the error interval for y.
- 4Substitution2 marks
Work out the value of 4x - 6 when x = 5.
- 5Percentages2 marks
Work out 15% of 120.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of September 1979, including the monthly compilation PDF.