Daily Practice

Foundation Plus

11th February 1971

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

1
Best Buy Questions3 marks
A pack of 4 pencils costs £2.20. A pack of 16 costs £7.84. Which pack is better value?
2
Vectors2 marks
a is the column vector (-1, 2) and b is (-5, 4). 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 5, 11, 10, 10. Write down the cumulative frequency at the end of the third class.
5
Error Intervals2 marks
A number y is 65 when truncated to the nearest whole number. Write down the error interval for y.

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