Daily Practice · Foundation Plus

Daily Practice - Foundation Plus

Grades 4-6 - the Foundation / Higher crossover zone.

17th September 1998

5 questions · 13 marks · Grades 4-6 · 128 question types in this band

1
Best Buy Questions3 marks
A pack of 10 batteries costs £6.00. A pack of 20 costs £11.80. Which pack is better value?
2
Vectors2 marks
a is the column vector (-4, -5) and b is (-4, -5). Work out a + b as a column vector.
3
Probability Trees3 marks
3 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 4 households own 1 car, 7 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 89 when truncated to the nearest whole number. Write down the error interval for y.

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