Daily Practice · Foundation Plus

Daily Practice - Foundation Plus

11th March 1993

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

1
Best Buy Questions3 marks
A pack of 8 pencils costs £4.80. A pack of 16 costs £9.28. Which pack is better value?
2
Vectors2 marks
a is the column vector (1, 4) and b is (0, 1). Work out a + b as a column vector.
3
Probability Trees3 marks
1 of 10 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 172 values. What cumulative frequency do you read across from to estimate the lower quartile?
5
Error Intervals2 marks
A number y is 19 when truncated to the nearest whole number. Write down the error interval for y.

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