Daily Practice

Higher

15th August 1975

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

1
Conditional Probability3 marks
18 students study Spanish and 9 of those also study Art. One Spanish student is picked at random. Work out the probability they study Art.
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^-2 as a fraction.
4
Quadratic Formula3 marks
Work out the discriminant of 4x^2 + x + 3 = 0 and say how many real solutions it has.
5
Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 3, y = 36. Work out y when x = 5.

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