exam Maths Puzzle Numerical Ability

I need help on homework and i need to show my work 5c-2d+3d-d

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exam Other Question

how do you simplify integers? for example(|1|) A fruit bowl has 7 apples and 4 oranges. If one piece of fruit is selected at random and then a second piece of fruit is selected ar random, what are the chances that both pieces of fruit will be apples (this is without replacement)?