Daily Practice

Higher

2nd November 1987

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 20%. Work out the overall percentage change, to 2 decimal places.
2
Vectors3 marks
a is the column vector (-4, 2) and b is (-1, 5). Work out 4a - 3b as a column vector.
3
Probability Trees3 marks
1 of 9 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 228 values. What cumulative frequency do you read across from to estimate the lower quartile?
5
Reverse Percentages3 marks
A bill is £48 including VAT at 20%. Work out the amount before VAT.

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