Daily Practice - Foundation Plus
Grades 4-6 - the Foundation / Higher crossover zone.
- 1Ratio2 marks
Red and blue marbles are in the ratio 4 : 5. There are 40 red marbles. How many marbles are there altogether?
- 2Vectors2 marks
a is the column vector (-8, 2) and b is (-4, 7). 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.
- 4Averages from Frequency Tables2 marks
Grouped data has five classes of width 10, the first being 30 < x <= 40. The frequencies in order are 16, 3, 21, 7, 11. Write down the modal class.
- 5Error Intervals2 marks
A number y is 56 when truncated to the nearest whole number. Write down the error interval for y.
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