Daily Practice

Foundation Plus

20th January 1982

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

1
Percentages2 marks
Work out 40% of 80.
2
Vectors2 marks
a is the column vector (1, 5) and b is (7, -2). Work out a + b as a column vector.
3
Probability Trees3 marks
5 of 7 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 5 < x <= 10. The frequencies in order are 21, 3, 7, 16, 11. Write down the modal class.
5
Error Intervals2 marks
A number y is 86 when truncated to the nearest whole number. Write down the error interval for y.

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