Daily Practice

Foundation Plus

14th September 1978

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

1
Best Buy Questions3 marks
A pack of 10 sponges costs £5.00. A pack of 20 costs £9.20. Which pack is better value?
2
Vectors2 marks
a is the column vector (-8, 4) and b is (-4, -7). Work out a + b as a column vector.
3
Probability Trees3 marks
4 of 7 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 6, 6, 6, 7. Write down the cumulative frequency at the end of the third class.
5
Error Intervals2 marks
A number y is 14 when truncated to the nearest whole number. Write down the error interval for y.

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