Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
10th June 2000
- 1Probability Trees3 marks
3 of 5 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
- 2Box Plots2 marks
A box plot has minimum 8, lower quartile 14, median 20, upper quartile 25 and maximum 35. Work out the interquartile range.
- 3The Product Rule for Counting3 marks
A code is 2 letters (A to Z) followed by 3 digits (0 to 9), and repeats are allowed. How many codes are possible?
- 4Equation of a Line3 marks
A line has gradient -4 and passes through (5, -16). Work out its equation.
- 5Direct and Inverse Proportion Depth3 marks
y is directly proportional to x^2. When x = 3, y = 81. Work out y when x = 6.
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