A telephone company has no.'s between 3000-3799.A Company called X uses the numbers from 3300-3499.Out of these managers of Division1 level use numbers ending with 0 or 1.What percent of the telephone company numbers are used byManagers of Division1

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Atelephonecompanyhasno.''sbetween3000-3799.ACompanycalledXusesthenumbersfrom3300-3499.Outofthesemanag

A telephone company has no.'s between 3000-3799.A Company called X uses the numbers from 3300-3499.Out of these managers of Division1 level use numbers ending with 0 or 1.What percent of the telephone company numbers are used byManagers of Division1
A telephone company has no.'s between 3000-3799.A Company called X uses the numbers from 3300-3499.Out of these managers of Division1 level use numbers ending with 0 or 1.What percent of the telephone company numbers are used by
Managers of Division1 level of Comany

A telephone company has no.'s between 3000-3799.A Company called X uses the numbers from 3300-3499.Out of these managers of Division1 level use numbers ending with 0 or 1.What percent of the telephone company numbers are used byManagers of Division1
3300~3499尾数为0或者1的一共有2x20=40个,所以比例是40/800=5%

Managers of Division 1 level of Company X用的电话号码为:3300, 3301, 3310, 3311,......, 3490, 3491共20个。总共有800个电话,故2.5%的电话被使用。