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" C^. 27. A person wishes to make up as many different parties as he can out of 20 friends, each party consisting of the same number ; how many should he invite at a time ? 28. When the No. of Combs. of 2n things taken r together is the greatest possible... "
Collection of Examples and Problems in Pure and Mixed Mathematics: With ... - Pągina 61
per Alfred Wrigley - 1862 - 294 pągines
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A collection of examples in pure and mixed mathematics, with hints and ...

Alfred Wrigley - 1852 - 344 pągines
...generally C(£ denotes the No. of Combs. of m things taken p together; show that C£t = C(rj + C(r~l). 798. A person wishes to make up as many different parties...same number ; how many should he invite at a time ? 799. When the No. of Combs. of in things taken r together is the greatest possible ; required r....
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National Society's Monthly Paper

1856 - 376 pągines
...ratio of 3 to 8. What proportion must be taken from each to make a mixture in the ratio of 7 to 11! 3. A person wishes to make up as many different parties as he can out of 20 friends, each party being of the same number ; liow many should l,e invite at a time ? SECT. II. — 1. Find four numbers...
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A collection of examples in pure and mixed mathematics, with hints and ...

Alfred Wrigley - 1857 - 332 pągines
...generally, C*' denote the No. of Combs. of m things taken p together; show that CB(;)I=C(;) + C(r;0. 27. A person wishes to make up as many different parties...symbol, and the numbers of their faces are 4, 6, 8, 12 respectively ; taking all of them together, how many different throws are possible ? 30. Find the...
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A collection of examples in pure and mixed mathematics, with hints and ...

Alfred Wrigley - 1859 - 328 pągines
...generally, C „' denote the No. of Combs. of m things taken p together-; show that C.(?, = C(? + C^. 27. A person wishes to make up as many different parties...different symbol, and the numbers of their faces are 4, 6,8, 12 respectively; taking all of them together, how many different throws are possible ? 30. Find...
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Wentworth and Hill's Examination Manuals: Algebra, Edició 2

George Albert Wentworth - 1884 - 166 pągines
...з? + з?, find the value of x in terms of y, de139. i. solve M=J_. ! + !=!. xyx + yy? f a2 2. A man wishes to make up as many different parties as he...same number. How many should he invite at a time, and how many parties will there be ? 3. If on an average 2 ships out of 5 return safe to port, what...
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"Wentworth & Hill's Exercise Manuals: Algebra, Edició 2

George Albert Wentworth - 1889 - 406 pągines
...x> + ж2, find the value of x in terms of y, de70 EXAMINATION MANUAL. 139. I- Solve M= т 2. A man wishes to make up as many different parties as he...same number. How many should he invite at a time, and how many parties will there be ? 3. If on an average 2 ships out of 5 return sale to port, what...
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Exercises in Algebra, Parts 1-2

George Albert Wentworth - 1897 - 410 pągines
...139. 1. Solve - + - = 1 ; i+i=AX 1/ X "T~ V *ь ^r A 2. A man wishes to make up as many différera parties as he can out of 20 friends, each party consisting...same number. How many should he invite at a time, and how many parties will there be ? 3. If on an average 2 ships out of 5 return safe to port, what...
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Exercises in Algebra, Parts 1-2

George Albert Wentworth - 1901 - 396 pągines
...з? -|- xя, find the value of x in terms of y, de139. 1. Solve + = _ +ж у ж + yx У а 2. A man wishes to make up as many different parties as he...same number, How many should he invite at a time, and how many parties will there be ? 3. If on an average 2 ships out of 5 return safe to port, what...
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School Algebra, Volum 1

William Ernst Paterson - 1908 - 614 pągines
...ways in which r\ a selection of four letters can be made from the letters of this word. ^ L + 1 ' 38. A person wishes to make up as many different parties...the same number, how many should he invite at a time ? 39. In how many ways can 12 persons be divided into three sets of four each, one set to play lawn-tennis,...
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Transactions, Volum 28

Actuarial Society of America - 1927 - 480 pągines
...15 students be separated into three equal sub-groups and assigned to three specified teachers ? (6) A person wishes to make up as many different parties as he can out of twenty persons, each party consisting of the same number of persons. How many should he invite at one...
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