Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
12th January 2009
- 1Conditional Probability3 marks
13 students study Spanish and 9 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 104 values. What cumulative frequency do you read across from to estimate the lower quartile?
- 3Bounds2 marks
A mass is 7 kg, correct to the nearest whole number. Write down the upper bound.
- 4Drawing Quadratic Graphs2 marks
For the curve y = x^2 - 7x + 1, work out y when x = 0.
- 5Repeated Percentage Change3 marks
A price rises by 20% and then falls by 15%. Work out the overall percentage change, to 2 decimal places.
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