Daily Practice

Foundation Plus

9th January 1991

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

1
Percentages2 marks
Work out 5% of 160.
2
Vectors2 marks
a is the column vector (-2, -6) and b is (5, 7). Work out a + b as a column vector.
3
Probability Trees3 marks
7 of 10 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
4
Cumulative Frequency2 marks
A cumulative frequency graph is drawn for 128 values. What cumulative frequency do you read across from to estimate the lower quartile?
5
Error Intervals2 marks
A number y is 50 when truncated to the nearest whole number. Write down the error interval for y.

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