Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
14th September 2016
- 1Probability Trees3 marks
4 of 8 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 2Cumulative Frequency2 marks
Four classes in order have frequencies 8, 5, 7, 4. Write down the cumulative frequency at the end of the third class.
- 3The Product Rule for Counting3 marks
A code is 2 letters (A to Z) followed by 4 digits (0 to 9), and repeats are allowed. How many codes are possible?
- 4Trigonometric and Exponential Graphs2 marks
The curve y = 4^x is drawn. Work out y when x = 2, and write down where the curve crosses the y-axis.
- 5Speed and Density2 marks
A block has volume 195 cm^3 and density 11 g/cm^3. Work out its mass.
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