Daily Practice - Foundation Plus
Grades 4-6 - the Foundation / Higher crossover zone.
21st September 2011
- 1Percentages2 marks
Work out 15% of 320.
- 2Vectors2 marks
a is the column vector (-7, 8) and b is (-8, -8). Work out a + b as a column vector.
- 3Probability Trees3 marks
7 of 10 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 4Averages from Frequency Tables3 marks
In a survey 5 households own 1 car, 9 own 2 cars and 4 own 3 cars. Work out the mean number of cars, to 2 decimal places.
- 5Error Intervals2 marks
A number y is 78 when truncated to the nearest whole number. Write down the error interval for y.
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Every sheet is deterministic: the same date always regenerates the same five questions. All of September 2011, including the monthly compilation PDF.