Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
8th February 2021
- 1Probability Trees3 marks
4 of 6 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 2Cumulative Frequency2 marks
A cumulative frequency graph is drawn for 224 values. What cumulative frequency do you read across from to estimate the lower quartile?
- 3Surds2 marks
Write sqrt(72) in the form a sqrt(b), where b is as small as possible.
- 4Simultaneous Equations3 marks
2 teas and 3 cakes cost £11.55. 3 teas and 3 cakes cost £13.50. Find the price of a tea.
- 5Repeated Percentage Change3 marks
A price rises by 10% and then falls by 15%. Work out the overall percentage change, to 2 decimal places.
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