Daily Practice - Foundation Plus
Grades 4-6 - the Foundation / Higher crossover zone.
27th September 2003
- 1Ratio2 marks
Red and blue raffle tickets are in the ratio 3 : 4. There are 33 red raffle tickets. How many raffle tickets are there altogether?
- 2Vectors2 marks
a is the column vector (3, 7) and b is (1, 6). Work out a + b as a column vector.
- 3Probability Trees3 marks
5 of 7 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 40 < x <= 50. The frequencies in order are 21, 3, 16, 11, 7. Write down the modal class.
- 5Error Intervals2 marks
A number y is 28 when truncated to the nearest whole number. Write down the error interval for y.
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