Daily Practice · Higher

Daily Practice - Higher

Grades 6-7 - Higher-tier method and manipulation.

20th May 2011

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

1
Probability Trees3 marks
4 of 8 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 ladybird population of a garden. State one assumption the method relies on.
3
Bounds2 marks
A mass is 390 kg, correct to the nearest 10. Write down the upper bound.
4
Simultaneous Equations3 marks
5 teas and 2 cakes cost £11.85. 4 teas and 5 cakes cost £14.75. Find the price of a tea.
5
Direct and Inverse Proportion3 marks
y is directly proportional to x. When x = 9, y = 36. Work out y when x = 11.

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