Daily Practice - Foundation Plus
Grades 4-6 - the Foundation / Higher crossover zone.
25th March 2004
- 1Best Buy Questions3 marks
A pack of 6 batteries costs £1.20. A pack of 24 costs £3.36. Which pack is better value?
- 2Vectors2 marks
a is the column vector (8, 7) and b is (1, 6). Work out a + b as a column vector.
- 3Probability Trees3 marks
4 of 8 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 4Frequency Trees3 marks
110 people were surveyed. 80 were adults, of whom 40 said yes. 10 of the children said yes. How many said yes altogether?
- 5Error Intervals2 marks
A number y is 31 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 March 2004, including the monthly compilation PDF.