Daily Practice

Foundation Plus

23rd July 1988

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

1
Ratio2 marks
Red and blue raffle tickets are in the ratio 7 : 9. There are 91 red raffle tickets. How many raffle tickets are there altogether?
2
Vectors2 marks
a is the column vector (-8, 1) and b is (4, -5). Work out a + b as a column vector.
3
Probability Trees3 marks
5 of 9 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 20 < x <= 30. The frequencies in order are 16, 7, 11, 21, 3. Write down the modal class.
5
Error Intervals2 marks
A number y is 79 when truncated to the nearest whole number. Write down the error interval for y.

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