trunefan4379 trunefan4379

03-09-2017
Mathematics

contestada

If 23 people shake each others hands once how many hands are shook in all

Respuesta :

Аноним Аноним

03-09-2017

This is the number of combinations of 2 from 23
23C2 = 23! / 2! 21!

A quick way to do this is 23*22 / 2 = 253

Answer Link

Otras preguntas

When dividing a heading in an outline, it should be divided into __________.

During the constitutional convention ,small states did not want their representation based on A.delegation B.location. C.condition D.population

what is 22/9 as a mixed number

a/b = c for b help me please this alot of a points please

Find the standard form of the equation of the ellipse satisfying the given conditions. Foci: (0, -2), (0, 2); y-intercepts: -5 and 5

Please help me I'm stuck on this help me with 22,23 and 27

TIFF is the default file format for most digital cameras. State True or False.

write an expression that shows how to multiply 7×256 using expand format and the Distributive property

nia has number cards for 2,3,8,9, and 5. what are all the different ways nia can arrange the cards to show only even numbers whit the 2 in the ten- thousands

what are three reasons that healthcare costs are rising so quickly?