Daily Practice - Foundation Plus
29th January 1994
- 1Ratio2 marks
Red and blue raffle tickets are in the ratio 2 : 5. There are 14 red raffle tickets. How many raffle tickets are there altogether?
- 2Vectors2 marks
a is the column vector (-4, -3) and b is (5, -8). Work out a + b as a column vector.
- 3Probability Trees3 marks
4 of 6 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 4Capture Recapture3 marks
30 newts are marked and released. Later 22 are caught, of which 2 are marked. Estimate the population.
- 5Error Intervals2 marks
A number y is 6 when truncated to the nearest whole number. Write down the error interval for y.
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