Daily Practice

Higher

22nd February 1991

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

1
Probability Trees3 marks
3 of 6 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 moth population of a meadow. State one assumption the method relies on.
3
Bounds2 marks
A mass is 7.1 kg, correct to 1 decimal place. Write down the lower bound.
4
Simultaneous Equations3 marks
4 teas and 2 cakes cost £11.10. 1 tea and 4 cakes cost £13.80. Find the price of a tea.
5
Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 6, y = 18. Work out y when x = 2.

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