Daily Practice

Foundation Plus

25th December 1986

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

1
Best Buy Questions3 marks
A pack of 7 batteries costs £2.80. A pack of 14 costs £5.46. Which pack is better value?
2
Vectors2 marks
a is the column vector (-8, 5) and b is (-8, 1). Work out a + b as a column vector.
3
Probability Trees3 marks
3 of 6 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 2 and a maximum of 19. Work out the range.
5
Error Intervals2 marks
A number y is 73 when truncated to the nearest whole number. Write down the error interval for y.

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