Daily Practice

Foundation Plus

14th November 1987

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

1
Ratio2 marks
Red and blue sweets are in the ratio 4 : 9. There are 60 red sweets. How many sweets are there altogether?
2
Vectors2 marks
a is the column vector (4, -6) and b is (4, 0). Work out a + b as a column vector.
3
Probability Trees3 marks
1 of 8 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
4
Averages from Frequency Tables3 marks
In a survey 9 households own 1 car, 9 own 2 cars and 9 own 3 cars. Work out the mean number of cars, to 2 decimal places.
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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