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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. "
The Progressive Higher Arithmetic: For Schools, Academies, and Mercantile ... - Page 351
by Horatio Nelson Robinson - 1860 - 456 pages
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A New System of Arithmetic, on the Cancelling Plan: Embracing the Rules of ...

Charles Guilford Burnham - Arithmetic - 1837 - 256 pages
...Ibs.= 12J cts., the worth of 1 Ib. of the mixture. Hence the RULE. Multiply each quantity by its price, and divide the sum of the products by the sum of the quantities ; the quotient will be the rate of the compound required. EXAMPLES. 2. A grocer mixes sugar,...
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Mental and Practical Arithmetic

Charles Davies - Arithmetic - 1838 - 288 pages
...the whole ? OPERATION. We here multiply each sum 200 x 2 = 400 by the time at which it becomes due, and divide the sum of the products by the sum of the payments. 200x4= 800 200x6 = 1200 600 )24|00 Ans. 4 months. . 3. A merchant owes $600, of which $100 is to be...
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An Essay on Probabilities: And on Their Application to Life Contingencies ...

Augustus De Morgan - Annuities - 1838 - 380 pages
...of 4 and 1, and the method of finding an average is this : multiply every observation by its weight and divide the sum of the products by the sum of the weights. Such a method was adopted before the theory of probabilities was applied to the subject, as...
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The Private Instructor, Or Mathematics Simplified: Comprising Every Thing ...

Jason M. Mahan - Arithmetic - 1839 - 304 pages
...will be the true equated time. RULE 2. Multiply each several payment by the time it has to run : then divide the sum of the products by the sum of the payments ; the quotient will be the equated time, nearly. Examples. IA owes B. S1800, whereof S200 is to. be paid at 6 months, 8400 at...
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The North American Arithmetic: For Advanced Scholars. part third

Frederick Emerson - Arithmetic - 1839 - 300 pages
...sum oi them by the sum of the debts. RULE. Multiply each debt by the time, in which it is payable, and divide the sum of the products by the sum of the debts: the quotient will be the equated time. 1. If I owe you 50 dollars payable in 4 months, 75 dollars...
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Complete Schoolmaster's Assistant: Being a Plain Comprehensive System of ...

Nathan Daboll - 1839
...several debts, due at different times. RULE. Multiply each payment by the time at which it is due, then divide the sum of the products by the sum of the payments, and the quotient will be the answer. • . . EXAMPLES. 1. A owes B $380, to be paid $100 in 6 months,...
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Adams's New Arithmetic: Arithmetic, in which the Principles of Operating by ...

Daniel Adams - Arithmetic - 1840 - 264 pages
...find the mean lime for several payments, — RULE • — 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 rule is founded on the supposition, that what is gained...
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A New System of Arithmetic: In which is Explained and Applied to Practical ...

Calvin Tracy - Arithmetic - 1840 - 316 pages
...following rule : RULE. — Multiply each payment by the time which must elapse before it becomes due, and divide the sum of the products by the sum of the payments. 2. A. owes me $50, payable in 4 months ; $100, payable in 10 months ; and $150, payable in 16 months....
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Adams's New Arithmetic...: Arithmetic, in which the Principles of Operating ...

Daniel Adams - Arithmetic - 1848 - 316 pages
...6-j-days, Ans. Hence, To find the mean time of several payments, Multiply each sum by its time of payment, and divide the sum of the products by the sum of the payments. EXAMPLES FOR PRACTICE. 4. A western merchant owes in New York city $200, due in 5 months; $325'50,...
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A Practical Treatise on Arithmetic: Wherein Every Principle Taught is ...

George Leonard - 1841 - 356 pages
...either debtor or creditor, merchants usually Multiply each debt by the time to elapse before it is due, and divide the sum of the products by the sum of the debts. Though this method is inaccurate it is easy, and experiment shows it may be employed without...
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