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" Multiply each payment by its term of credit, and divide the sum of the products by the sum of the payments ; the quotient will be the average term of credit. "
Introduction to arithmetic - Σελίδα 114
των Chambers W. and R., ltd - 1854
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...rates and quantities of the sev* eral simples given, RULE.* ' Multiply each quantity by its rate ; then divide the sum. of the products by the sum of the quantities, or the whole composition, * The truth of this rule is too evident to need a demonstration. NOTE. If...

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...find the mean time for several payments, — RUt.E : — Multiply each sum by its time of payment, and divide the sum of the products by the sum of the payments, and the quotient will be the answer. Note. This rale is founded on the supposition, that...

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...either to the holder or receiver. "Rtit'E. Multiply each payment by the time at which it becomes due, and divide the sum of the products by the sum •of the payments, and the quotient will be the medium time required. Ex. 1. I have to receive £967 in notes,...

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...rates and quantities of the several simples given. RULE. Multiply each quantity by its rate ; then divide the sum of the products by the sum of the quantities, the quotient will be the rate of the compound required. EXAMPLES. 1. Suppose 15 bushels of rye, at 64 cts. pr. bushel,...

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