Daily Practice

Foundation Plus

8th March 1973

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

1
Best Buy Questions3 marks
A pack of 4 batteries costs £2.20. A pack of 8 costs £4.16. Which pack is better value?
2
Vectors2 marks
a is the column vector (-8, -5) and b is (-5, 4). 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
Scatter Graphs2 marks
A scatter graph plots a person's shoe size and their height. What type of correlation would you expect?
5
Error Intervals2 marks
A number y is 25 when truncated to the nearest whole number. Write down the error interval for y.

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