时间:2018-12-28 作者:英语课 分类:趣谈英语


英语课

 Pre-Listening Vocabulary



paradox 1: a statement that seems senseless, even though it’s possible or true
probable: likely
random 2: not planned

The Birthday Paradox


 


In a classroom of 23 people, there is a 50-50 chance that two of them have the same birthday. This is called the Birthday Paradox (also known as The Birthday Problem). While it may seem senseless that two people out of 23 share a birthday, it is actually quite probable. The reason it seems unlikely is because of how you think of it. You think that it’s unlikely that you have the same birthday as someone else. You don’t think about the chances of the other 22 people in the room. If you think of it that way, you can see how the probability greatly increases. The first person has 22 chances to find a match on the attendance list. The second person only has 21 chances. When you get to the end of the list, you can add up all of the chances. Eventually, you find that there are 253 chances of finding matching birthdays in a random class of 23 people. Next time you’re in a group of 20-30 people, test out this probability theory.



1 paradox
n.似乎矛盾却正确的说法;自相矛盾的人(物)
  • The story contains many levels of paradox.这个故事存在多重悖论。
  • The paradox is that Japan does need serious education reform.矛盾的地方是日本确实需要教育改革。
2 random
adj.随机的;任意的;n.偶然的(或随便的)行动
  • The list is arranged in a random order.名单排列不分先后。
  • On random inspection the meat was found to be bad.经抽查,发现肉变质了。
学英语单词
-butazone
a sweet tooth
absorption trap
all's fair in love and war
amylocaine hydrochloride
anonymosity
arye
Bagnes, V.de
bellows differential gauge
Bernhausen
bilinearity
BLBT
bourgeois gentilhomme
C. S. D.
claudicants
Clematis jinzhaiensis
coaliferous gas
Cormack, Allan Macleod
cornoviis
current-limiting fuse-link
Cycas circinalis
different media
dimensionality invariant
direct internal reforming
Dyat'kovo
dysglandular
exencephalous
fistula of uterus
fistulous ulcer
Fitness/Exercise
folicaulicole
foreign oil-gas field
game warden
GDR,G.D.R.
Gentiana dahurica
glottocentrism
hat-boxes
helmholtz's ligament
Hesper
honey-urine
hypoplasia of mesenchyme
IFGO
indirect echoes
introduced plant
krekorian
lipoblasts
lipocalins
live in the moment
loncar
lose one's reckoning of
losing one's mind
mahalla
mazruis
meledandri
mendosa
mental excitation
mycotoxicologists
nozzle propulsion efficiency
oil reclamation
one level address
pedal steel(guitar)
perhydride
period measurement system
photoselection
planning ahead
pooled sera
pre-lightener
prevocational
procris laevigata
Puccinellia subspicata
quetstone
recarbonizes
remiger
Saint-Constant
self-exploitations
shroffage
skeds
snaking motion value of specimen stage
soil-water system
spondulics
standard equipment
step-by-step diplomacy
suffizance
tacheometrical record book
temperature strength
tennoes
thread size
to settle
tonologist
took
tooken
trunk room lamp
upshore
vena basilicas
waiting line theory
water protection
waterway bar
Western Reserve
whils
wind-induced response
Wujiaqu
yonte