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PERMUTATION AND COMBINATION

Across
A group must select a president, a moderator, and a secretary from 4 members in the group. How many arrangements of group leaders are there?
The ____ of a natural number n, the product of all positive integers less than or equal to n.
Permutation with identical objects
In how many ways can 5 girls be seated in a row of 3 seats?
How many straight lines can be drawn using five points, in which no three points are collinear?
any of the numerals from 0 to 9, especially when forming part of a number.
In permutation, _____ is important.
Is an ordered arrangement of objects in a circular manner
5C1 (5 CHOOSE 1)
Down
a lottery game similar to bingo.
Electing an auditor and a treasurer from 8 candidates is an example of ______.
a mechanism for keeping a door, lid, etc., fastened, typically operated only by a key of a particular form
Order is not important
There are 7 dots randomly placed on a circle, how many triangles can be formed using the dots as vertices?
Three players were numbered as 1, 2, and 3. How many teams of two players can be formed?