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(20 X 19)/2 = 190 Rationale: Each of the twenty unique objects can be paired with any other one of the objects to make 20 X 19 ordered pairs. However, each such pair will not be uniquely different from the pair with the same objects selected in opposite order. Therefore, 20 X 19 must be divided by 2.
What else can I help you with?
How many pairs of whole numbers equal the sum of 40?
20 of them
What are the ordered pairs for 20?
The Ordered Pairs are 1x20, 2x10, and 5x4.
Multiplication factor pairs of 20 what are they?
20,110,25,4
How many pairs of vertical angles are formed by 5 coplanar lines intersecting at one point?
20....or maybe 18
What objects are 20 degrees Celsius?
Celsius measures temperature, not objects.
How many factor pairs does 20 have and what are they?
20 has 3 factor pairs. Pairs are (1,20), (2,10) and (9,9)
How many pairs of factors does 20 have?
3 pairs
How many lines from corner to corner would a 20 sided shape have?
Simplify the problem a bit. You have 20 dots and you want to connect pairs of dots, so you're looking for how many unique sets of 2 objects you can choose from 20 distinct objects. Thus you have 20[[Choose]]2 = 20!/(18!2!) = 10*19 = 190 such sets, which correspond to 190 distinct lines. However, there are 20 lines connecting the edges of the 20-sided shape, so we actually have 190 - 20 = 170 lines not corresponding to edges.
How many factor pairs does 20 have?
There are 3 factor pairs of 20: 1 x 20, 2 x 10 and 4 x 5.
How many pairs of sneakers do sneaker heads have?
I have 20.
How many factor pairs did number 20 have?
Three of them.
What are Selena's favorite shoes and how many pairs does she have of that kind of shoe?
covers over 20 pairs
How many 2 students are in 20?
There are 10 pairs of two students in 20 students
How many factor pairs do 20 have and what are they?
3 pairs of factors. They are: 1 and 20 2 and 10 4 and 5 Pairs of factors are numbers that you multiply together to make that number, e.g. 4x5=20. Trust me I'm a teacher!
All the factor pairs of 20?
The factor pairs of 20 are pairs of numbers that can be multiplied together to give 20. The factor pairs of 20 are (1, 20), (2, 10), and (4, 5). These pairs represent all the possible combinations of numbers that can be multiplied to equal 20.
How many pairs of whole numbers equal the sum of 40?
20 of them
How many chromosomes does a species have if it contains 10 pairs of homologous chromosomes?
20
