Lottery balls numbered consecutively from 1 through 100 are placed in a spinner.

游客2025-02-27 24

问题 Lottery balls numbered consecutively from 1 through 100 are placed in a spinner. If one ball is drawn at random, what is the probability that it will have the number 1 on it exactly once?

选项 A、
B、
C、
D、
E、

答案 D

解析 The balls with the number 1 on them exactly once are 1, 10, 12, 13, 14, 15, 16, 17, 18, 19, 21, 31, 41, 51, 61, 71, 81, 91, and 100. Count them up and we get 19 balls out of 100.

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Lottery balls numbered consecutively from 1 through 100 are placed in a spinner.

Fiveredballsandtwoblueballsareplacedinallemptybox.Oneballatimei

Intherectangularcoordinatesystem,linekpassesthroughthepoint(n,-l).Is

Editorialist:Additionalrestrictionsshouldbeplacedondriver’slicensesof

Althoughcustomprostheticbonereplacementsproducedthroughanewcomputer-aid

OncecommonthroughouttheWesternplains,black-footedferretsarethoughttoh

Incontrasttolargesteelplantsthattakeironorethroughallthestepsneede

Theschoolboardrulingmandatingthatphysicallyhandicappedstudentsbeplaced

Thelaboragreementpermitsstaffreductionsthroughattritionwithincreasedpe

Acontroversialfigurethroughoutmostofhispubliclife,theBlackleaderMarc

ArocaCitycurrentlyfundsitspublicschoolsthroughtaxesonproperty.Inplac

Statesareconsideringmajorchangesinprepaidcollegetuitionprograms——rai

Babbitwasapettyfigurecreatedby______whowasthefirstAmericanwriterto

PassageThree[br]Whatdobirdselovefrom,consideringArchaeopteryxatransit

Themanrobbed______anddisappearedroundthecorner.A、ofherB、ofhermoneyC

在我国，个人投资者从事期货交易必须在()开户。A、期货公司B、期货交易所C、中国证监会派出机构D、中国期货市场监控中心A参与期货交易的自然人被

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