Daily Practice

Foundation Plus

5th January 1978

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

1
Best Buy Questions3 marks
A pack of 8 pencils costs £4.40. A pack of 24 costs £12.48. Which pack is better value?
2
Vectors2 marks
a is the column vector (-7, 4) and b is (2, -5). 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
Cumulative Frequency2 marks
A cumulative frequency graph is drawn for 152 values. What cumulative frequency do you read across from to estimate the lower quartile?
5
Error Intervals2 marks
A number y is 7 when truncated to the nearest whole number. Write down the error interval for y.

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