Foundation Plus
13th January 1973
- 1Ratio2 marks
Red and blue raffle tickets are in the ratio 2 : 5. There are 12 red raffle tickets. How many raffle tickets are there altogether?
- 2Angles in Polygons2 marks
A regular polygon has an exterior angle of 18°. How many sides does it have?
- 3Probability Trees3 marks
3 of 8 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 4Two Way Tables3 marks
Of 42 students, 13 study French, 21 study German and 7 study both. How many study neither?
- 5Error Intervals2 marks
A number y is 28 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.