Foundation Plus
3rd September 1987
- 1Best Buy Questions3 marks
A pack of 10 pencils costs £3.00. A pack of 20 costs £5.40. Which pack is better value?
- 2Vectors2 marks
a is the column vector (5, 2) and b is (-7, 2). Work out a + b as a column vector.
- 3Probability Trees3 marks
5 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 70 students, 38 study French, 43 study German and 14 study both. How many study neither?
- 5Error Intervals2 marks
A number y is 90 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 September 1987, including the monthly compilation PDF.