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

A 60-Hz 3-phase induction motor is required to drive a load at approximately 850 rpm. How many poles should the motor have

rotation and revolution sometimes are

Dioptría de una persona que puede enfocar hasta 30 cm sin gafas

Solve the following: 5(2x+1)=50

How can a sales user relate an opportunity to. a campaign? (2 answers) A. Select the primary campaign source for the opportunity. B. Use the campaign influence

Which comparison operator is valid for greater than or equal to? > >= =>

Which sentence uses the underlined vocabulary word incorrectly? A. He was so emotional after graduation that his tears came in an incontinent manner. B. His sto

Which province has the high density of population?Explain with reasons.

Apply Decision Tree Algorithm on the following data:

when 2x³-5x²+4x-8 is divided by ax²+bx+c the quotient is x-2 and the remainder is bx-a find the value of a,b and c?