Sets
2 marks · EasyA set T contains the colours: red, blue, green, yellow. One of the colours is removed at random. Write down the set of colours remaining if 'blue' is removed.
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\{red, green, yellow\}
Also accept: {red, green, yellow}
Common mistakes: {red, blue, green, yellow}; {red, yellow, green, blue}
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Marking points
B1 · 1 mark · Lists the correct elements or removes only 'blue' from the original set.
A1 · 1 mark · Set correctly written in curly brackets.
Worked solution
Remove 'blue' from {red, blue, green, yellow}: {red, green, yellow}