Daily Practice - Foundation Plus
11th June 1996
- 1Writing and Simplifying Ratio2 marks
Write the ratio 2 : 14 in the form 1 : n.
- 2Vectors2 marks
a is the column vector (4, 2) and b is (-7, 8). Work out a + b as a column vector.
- 3Probability Trees3 marks
1 of 7 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 4Cumulative Frequency2 marks
A cumulative frequency graph is drawn for 104 values. What cumulative frequency do you read across from to estimate the lower quartile?
- 5Error Intervals2 marks
A number y is 13 when truncated to the nearest whole number. Write down the error interval for y.
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