Daily Practice

Higher

4th September 1989

5 questions · 14 marks · Grades 6-7 · 61 question types in this band

1
Repeated Percentage Change3 marks
A price rises by 25% and then falls by 25%. Work out the overall percentage change, to 2 decimal places.
2
Vectors3 marks
a is the column vector (-2, 1) and b is (-2, 1). Work out 4a - 3b as a column vector.
3
Probability Trees3 marks
3 of 7 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 124 values. What cumulative frequency do you read across from to estimate the lower quartile?
5
Standard Form3 marks
Work out (18 x 10^9) / (6 x 10^3). Give your answer in standard form.

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