Daily Practice

Higher

14th July 1989

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

1
Probability Trees3 marks
2 of 7 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 newt population of a stream. State one assumption the method relies on.
3
Fractional and Negative Indices2 marks
Write 9^-3 as a fraction.
4
Equation of a Line3 marks
A line has gradient -5 and passes through (3, -21). Work out its equation.
5
Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 8, y = 32. Work out y when x = 4.

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