trunefan4379 trunefan4379

Today at 3:12 AM
Mathematics

Answered

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

Answer :

Аноним Аноним

Today at 3:17 AM

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

Other Questions

Help meeeeeeeeeeeeeeeeeeeeeeeee

What is a political party?

Do midg.ets have night-vision?

The points in the table lie on a line. Find the slope of the line.

Mrs. Wilson comes into Dr. Tyler's office to be seen for a sore throat and fever. the exam revels that Mrs. Wilson has Tonsillitis. Dr. Tyler writes an order in

why is it important to conserve biodiversity?

ক) সাংস্কৃতিক আত্তীকরণ বলতে কি বুয়?খ) সামাজিক পরিবর্তনের ২টি উদাহরণ দাও।গ) রনিদের এলাকার মতাে পরিস্থিতিতে তােমার এলাকায় কোভিড আক্রান্তদেরজন্য বিদ্যালয়ের বন্ধ

Prove that if a transversal intersects two lines such that a pair of alternate interior angles is equal ,then the two lines are parallal.

Determine the value of [f(a,b) + g(a,b)] at a=2 and b=-2

3. find the core of anequalatoktricengele whose sides is 3 cm.

2. Fast forward to today's American politics. Which political party today (either the Democratic Party or the Republican) do you think follows the Federalist be

When we think of the term hygiene, we commonly think of keeping our bodies clean and groomed. Another type of hygiene is sleep hygiene. What steps do you take t

Garry is building a fence for his neighbor. The backyard requires 172.5 feet of fencing. If each fencing board is 1/2 - foot wide, how many fencing boards will

2 2/5 x 4 3/4 A 8 3/10 B 11 2/5 C 9 3/10 D 10 3/5

Help me please did i get the correct and what are the correct answers??

How did the bill of rights help resolve the differences between these two view points

Why is the neolithic revolution considered a turning point in human history

How are new elements made and named?

Write the equation of a line with slope -1/3 and y-intercept -7 A. y=-7x-1/3 B. y=-1/3x+7 C. y=-1/3x-7

Which of the following ways can help prevent foodborne illnesses when storing food? 1)Cleaning the inside of the refrigerator monthly 2)Refrigerating or freezi