Daily Practice · Foundation Plus

Daily Practice - Foundation Plus

2nd July 1992

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

1
Best Buy Questions3 marks
A pack of 4 pencils costs £1.40. A pack of 8 costs £2.32. Which pack is better value?
2
Vectors2 marks
a is the column vector (3, 5) and b is (-6, -8). Work out a + b as a column vector.
3
Probability Trees3 marks
2 of 7 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 minimum 6, lower quartile 15, median 19, upper quartile 21 and maximum 26. Work out the interquartile range.
5
Error Intervals2 marks
A number y is 22 when truncated to the nearest whole number. Write down the error interval for y.

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