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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 Youth's Assistant in Theoretic[!] and Practical Arithmetic ... - Page 82
by Zadock Thompson - 1832 - 168 pages

Introduction to The National Arithmetic: On the Inductive System : Combining ...

Benjamin Greenleaf - Arithmetic - 1857 - 336 pages
...payment of the whole. Hence the following RULE. — Multiply each payment by its own time of credit, and divide the sum of the products by the sum of the payments. NOTE 1. — This is the rule usually adopted by merchants, hut it is not perfectly correct...

A New System of Arithmetic, on an Improved Plan, Embracing the Rules of ...

Charles Guilford Burnham - 1857 - 336 pages
...75-7-15 = 5 months, the answer. Hence the RULE. Multiply each payment by the time when it becomes due, and divide the sum of the products by the sum of the payments, and the quotient will be the time required. 2. A merchant has owing him \$420, to be paid...

Burnham's Arithmetic, Revised: A New System of Arithmetic, on an Improved ...

Charles Guilford Burnham - Arithmetic - 1857 - 328 pages
...5-4-15 = 5 months, the answer. Hence the ' RULE. Multiply each payment by the time when it becomes due, and divide the sum of the products by the sum of the payments, and the quotient will be the time required. 2. A merchant has owing him \$420, to be paid...

Arithmetic, Practically Applied, for Advanced Pupils, and for Private ...

Horace Mann, Pliny Earle Chase - Arithmetic - 1857 - 394 pages
...several debts . Multiply each charge by the time which has elapsed from the date of the first bill, and divide the sum of the products by the sum of the bills. To find the equated time for the settlement of an account, in which there are both debits and...

A Treatise on Arithmetic, Combining Analysis and Synthesis: Adapted to the ...

James Stewart Eaton - Arithmetic - 1857 - 376 pages
...becomes due to the time when each of the others is due ; multiply each of these bills by its time, and divide the sum of the products by the sum of the bills ; the quotient will be the number of days from the time of the earliest payment to the equated...

Arithmetic, Practically Applied, for Advanced Pupils, and for Private ...

Horace Mann, Pliny Earle Chase - Arithmetic - 1857 - 388 pages
...several debts . Multiply each charge by the time which has elapsed from the date of the first billy and divide the sum of the products by the sum of the Mils. To find the equated time for the settlement of an account, in which there are both debits and...

The North American Practical School Arithmetic: Particularly Adapted to the ...

David Price - Arithmetic - 1858 - 266 pages
...average or mean time, where there are debus only. RULE. — Multiply each debt by the time it has to run, and divide the sum of the products by the sum of the debts ; the quotient will be the average time for the payment of the whole amount of the debts. PROOF....

A New System of Arithmetic, on an Improved Plan ...

Charles Guilford Burnham - 1859 - 338 pages
...whole mixture; then \$2.30-^-18 Ibs. = 12* cts., the worth of 1 pound of the mixture. Hence the RULE. Multiply each quantity by its price, and divide the...by the sum of the quantities. The quotient will be tlie rate of the compound required. EXAMPLES. 2. A grocer mixes sugar, 5 Ibs. at 6 cts., 8 Ibs. at...