Daily Practice

Higher

27th February 1984

5 questions · 13 marks · Grades 6-7 · 61 question types in this band

1
Repeated Percentage Change3 marks
A price rises by 15% and then falls by 15%. Work out the overall percentage change, to 2 decimal places.
2
Vectors3 marks
a is the column vector (-2, 3) and b is (-1, -2). Work out 3a - 2b as a column vector.
3
Probability Trees3 marks
2 of 5 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 104 values. What cumulative frequency do you read across from to estimate the lower quartile?
5
Bounds2 marks
A mass is 39 kg, correct to the nearest whole number. Write down the lower bound.

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