Daily Practice

Higher

28th March 1983

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 10%. Work out the overall percentage change, to 2 decimal places.
2
Vectors3 marks
a is the column vector (-5, -6) and b is (2, -5). Work out 2a - 4b as a column vector.
3
Probability Trees3 marks
1 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 236 values. What cumulative frequency do you read across from to estimate the lower quartile?
5
The Product Rule for Counting2 marks
A meal deal has 5 mains, 5 sides and 6 drinks. How many different meals are possible?

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