Daily Practice

Foundation Plus

24th May 1979

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

1
Best Buy Questions3 marks
A pack of 9 sponges costs £1.35. A pack of 18 costs £1.62. Which pack is better value?
2
Vectors2 marks
a is the column vector (4, 7) and b is (-4, 0). Work out a + b as a column vector.
3
Probability Trees3 marks
6 of 8 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
4
Box Plots2 marks
A box plot has a minimum of 13 and a maximum of 41. Work out the range.
5
Error Intervals2 marks
A number y is 50 when truncated to the nearest whole number. Write down the error interval for y.

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