Daily Practice
Foundation Plus
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31st January 1973
- 1Percentages2 marks
Work out 20% of 340.
- 2Vectors2 marks
a is the column vector (-1, -5) and b is (8, 2). Work out a + b as a column vector.
- 3Probability Trees3 marks
3 of 9 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 4Scatter Graphs3 marks
A line of best fit on a scatter graph has equation y = 8x + 34. Use it to estimate y when x = 12.
- 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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Any date always gives the same five questions, so a sheet can be set again or shared. All of January 1973, including the monthly compilation PDF.