Daily Practice - Foundation Plus
Grades 4-6 - the Foundation / Higher crossover zone.
6th October 2015
- 1Writing and Simplifying Ratio2 marks
Write the ratio 7 : 28 in the form 1 : n.
- 2Vectors2 marks
a is the column vector (-4, -8) and b is (-2, -5). Work out a + b as a column vector.
- 3Probability Trees3 marks
2 of 7 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 4Capture Recapture3 marks
30 fish are marked and released. Later 12 are caught, of which 3 are marked. Estimate the population.
- 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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