Daily Practice

Higher

21st May 1991

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

1
Writing a Ratio as a Fraction or Linear Function2 marks
x : y = 5 : 8. Write y in terms of x.
2
Vectors3 marks
a is the column vector (5, 0) and b is (6, 0). Work out 5a - 3b as a column vector.
3
Probability Trees3 marks
1 of 6 bulbs in a box are faulty. Two are taken with replacement. Work out the probability at least one is faulty.
4
Capture Recapture3 marks
45 newts are marked and released. Later 8 are caught, of which 2 are marked. Estimate the population.
5
Bounds2 marks
A mass is 17.7 kg, correct to 1 decimal place. Write down the lower bound.

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