Daily Practice - Foundation Plus
Grades 4-6 - the Foundation / Higher crossover zone.
25th August 2016
- 1Best Buy Questions3 marks
A pack of 5 batteries costs £2.75. A pack of 20 costs £10.40. Which pack is better value?
- 2Vectors2 marks
a is the column vector (-5, -3) and b is (0, -2). Work out a + b as a column vector.
- 3Probability Trees3 marks
4 of 7 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 4Cumulative Frequency2 marks
Four classes in order have frequencies 7, 8, 6, 6. Write down the cumulative frequency at the end of the third class.
- 5Error Intervals2 marks
A number y is 67 when truncated to the nearest whole number. Write down the error interval for y.
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