Daily Practice
Foundation Plus
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22nd October 1957
- 1Writing and Simplifying Ratio2 marks
Write the ratio 5 : 10 in the form 1 : n.
- 2Vectors2 marks
a is the column vector (6, 4) and b is (6, -5). Work out a + b as a column vector.
- 3Probability Trees3 marks
2 of 5 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 4Box Plots2 marks
A box plot has minimum 14, lower quartile 23, median 28, upper quartile 33 and maximum 35. Work out the interquartile range.
- 5Error Intervals2 marks
A number y is 19 when truncated to the nearest whole number. Write down the error interval for y.
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Any date always gives the same five questions, so a sheet can be set again or shared. All of October 1957, including the monthly compilation PDF.