Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
21st February 2022
- 1Conditional Probability3 marks
17 students study Spanish and 4 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
- 2Cumulative Frequency2 marks
A cumulative frequency graph is drawn for 64 values. What cumulative frequency do you read across from to estimate the lower quartile?
- 3Standard Form3 marks
Work out (72 x 10^7) / (9 x 10^3). Give your answer in standard form.
- 4Quadratic Formula3 marks
Use the quadratic formula to solve x^2 - 10x + 8 = 0, to 2 decimal places.
- 5Repeated Percentage Change3 marks
A price rises by 10% and then falls by 20%. Work out the overall percentage change, to 2 decimal places.
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