Daily Practice

Foundation Plus

25th July 1974

5 questions · 13 marks · Grades 4-6 · 128 question types in this band

1
Best Buy Questions3 marks
A pack of 7 pencils costs £2.80. A pack of 28 costs £10.64. Which pack is better value?
2
Vectors2 marks
a is the column vector (-6, 6) and b is (3, 3). Work out a + b as a column vector.
3
Probability Trees3 marks
7 of 9 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
4
Capture Recapture3 marks
20 fish are marked and released. Later 9 are caught, of which 3 are marked. Estimate the population.
5
Error Intervals2 marks
A number y is 77 when truncated to the nearest whole number. Write down the error interval for y.

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