Demonstrate that the weighted average calculation given in equation (1.9) in the text is equivalent to finding

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Demonstrate that the weighted average calculation given in equation (1.9) in the text is equivalent to finding the total expenditure on education divided by the total number of pupils.


Equation (1.9)

0.444 × 890 + 0.389 × 1450 + 0.167 × 1910 = 1277.8

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