Daily Practice

Higher

22nd January 1982

5 questions · 14 marks · Grades 6-7 · 61 question types in this band

1
Conditional Probability3 marks
18 students study Spanish and 10 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 ladybird population of a garden. State one assumption the method relies on.
3
Fractional and Negative Indices3 marks
Work out 25^(3/2).
4
Quadratic Formula3 marks
Work out the discriminant of x^2 - x + 4 = 0 and say how many real solutions it has.
5
Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 6, y = 66. Work out y when x = 7.

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