Daily Practice

Foundation Plus

11th July 1963

5 questions · 12 marks · Grades 4-6 · 128 question types in this band

1
Best Buy Questions3 marks
A pack of 9 teabags costs £4.95. A pack of 36 costs £18.36. Which pack is better value?
2
Vectors2 marks
a is the column vector (7, 7) and b is (7, 6). Work out a + b as a column vector.
3
Probability Trees3 marks
1 of 8 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
4
Cumulative Frequency2 marks
Four classes in order have frequencies 3, 10, 11, 11. Write down the cumulative frequency at the end of the third class.
5
Error Intervals2 marks
A number y is 72 when truncated to the nearest whole number. Write down the error interval for y.

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