If an integer is randomly selected from all positive 2-digit integers, what is t

游客2024-01-12 30

问题 If an integer is randomly selected from all positive 2-digit integers, what is the probability that the integer chosen has
(a)a 4 in the tens place?
(b)at least one 4 in the tens place or the units place?
(c)no 4 in either place?

选项

答案 (a)1/9(b)1/5(c)4/5

解析

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If an integer is randomly selected from all positive 2-digit integers, what is t

Ifthesumoffiveconsecutiveoddintegersis5,whichofthefollowingcouldb

Ifxisapositive,single-digitintegersuchthat4x/3,2x,x,andx+2,and3x-2

Ifrisnegativeandsispositive,whichofthefollowingmustbenegative?A、|r

Thesquarerootof800isbetweenwhichofthefollowingintegers?A、21and25B、

Whichofthefollowingisequaltox24forallpositivevaluesofx?A、x12+x12B、

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