Daily Practice - Foundation Plus
Grades 4-6 - the Foundation / Higher crossover zone.
31st July 2014
- 1Best Buy Questions3 marks
A pack of 11 sponges costs £2.20. A pack of 22 costs £3.74. Which pack is better value?
- 2Vectors2 marks
a is the column vector (8, -1) and b is (-6, 2). Work out a + b as a column vector.
- 3Probability Trees3 marks
4 of 9 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 4Averages from Frequency Tables2 marks
Grouped data has five classes of width 10, the first being 10 < x <= 20. The frequencies in order are 16, 11, 21, 3, 7. Write down the modal class.
- 5Error Intervals2 marks
A number y is 61 when truncated to the nearest whole number. Write down the error interval for y.
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