Daily Practice

Foundation Plus

23rd August 1989

5 questions · 11 marks · Grades 4-6 · 128 question types in this band

1
Percentages2 marks
Work out 5% of 120.
2
Vectors2 marks
a is the column vector (-1, -5) and b is (-2, 2). Work out a + b as a column vector.
3
Probability Trees3 marks
4 of 10 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 10, the first being 30 < x <= 40. The frequencies in order are 3, 11, 7, 21, 16. Write down the modal class.
5
Error Intervals2 marks
A number y is 66 when truncated to the nearest whole number. Write down the error interval for y.

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