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

6 [ 4 × ( 72 - 63 ) ÷ 3 ]

What is the relationship between succession and climax vegetation?

if Teresa's daughter is my daughter's mother Who am I to Teresa

The absorption of glucose into the cell leads to the movement of water into the cell. Explain how

Which sentence does NOT correctly fix this run-on sentence? The car skidded luckily no one was near it. a. The car skidded, but luckily no one was near it. b. T

What happened to the world's population between 1950 to 2000?

Which statement best explains why citizens should serve on juries? a) Citizens should serve on juries to make a lot of money b) Citizens should serve on juries

Water weighs about 8.34 pounds per gallon about how many ounces per gallon is the weight of the water ?

Which of the following are effective ways of practicing your speech? presenting it in front of a mirror recording it with a video camera presenting it to fa

Which best describes the process that the pest population has experienced due to this environmental change? genetic diversity natural selection natural resistan