Daily Practice - Higher
Grades 6-7 - Higher-tier method and manipulation.
14th June 2013
- 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.
- 2Capture Recapture2 marks
A capture-recapture estimate is made of the ladybird population of a garden. State one assumption the method relies on.
- 3The Product Rule for Counting3 marks
A code is 2 letters (A to Z) followed by 2 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 Proportion3 marks
y is directly proportional to x. When x = 8, y = 96. Work out y when x = 11.
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