Daily Practice · Higher

Daily Practice - Higher

Grades 6-7 - Higher-tier method and manipulation.

9th October 2009

5 questions · 13 marks · Grades 6-7 · 61 question types in this band

1
Probability Trees3 marks
4 of 9 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
2
Capture Recapture2 marks
A capture-recapture estimate is made of the fish population of a pond. State one assumption the method relies on.
3
Fractional and Negative Indices2 marks
Write 7^-3 as a fraction.
4
Equation of a Line3 marks
A line has gradient -4 and passes through (2, -1). Work out its equation.
5
Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 4, y = 40. Work out y when x = 14.

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