Daily Practice

Foundation Plus

15th June 1961

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

1
Best Buy Questions3 marks
A pack of 9 pencils costs £3.60. A pack of 36 costs £12.96. Which pack is better value?
2
Vectors2 marks
a is the column vector (2, -3) and b is (5, -4). Work out a + b as a column vector.
3
Probability Trees3 marks
2 of 6 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
4
Averages from Frequency Tables2 marks
Grouped data has five classes of width 5, the first being 0 < x <= 5. The frequencies in order are 16, 3, 11, 21, 7. Write down the modal class.
5
Error Intervals2 marks
A number y is 50 when truncated to the nearest whole number. Write down the error interval for y.

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