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

游客2025-02-27 20

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

Chinatodayishometo13billionpeople--nearlyonequarteroftheworld’sp

Thethreeworld’srichestindustrialcountriesare______.[br][originaltext]

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某投机者以8．00美元／蒲式耳的执行价格卖出1手9月份小麦看涨期权，权利金为0．25美元／蒲式耳；同时以相同的执行价格买入1手12月份小麦看涨期权，权利金为0．

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