What is the sum of numerical coefficients of all terms containing xy in the given expression?
2xy + 4xy + 3yz + 8xy + 36xz (2 marks)

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Solution

In the given expression, the terms containing xy are:
2xy, 4xy, and 8xy.

Their respective numerical coefficients are 2, 4, and 8.(1 mark)
Thus, the sum of their coefficients = 2 + 4 + 8 = 14, which is the required answer. (1 mark)

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