All 3,000 lockers at a school are randomly assigned 3-digit combination
codes. the codes are made up of the digits 0 through 9. the digits can
be repeated. describe the likelihood that fewer than 5 of the lockers will
have the code 000.
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Answers4.) -1/205.) -1/406.) -55/127.) -3/4

Planet earth has a mass of 5.9726x10²⁴ kg.then: 5.9726x10²⁴ kg=100% of the total earth mass.if the water´s mass=5x10-4 % of the total mass, we can solve this problem by the rule of three.5.9726x10²⁴ %*10⁻⁴ %x=(5.9726x10²³ kg)(5*10⁻⁴  %) / 100 %=2.9863x10¹⁹ kganswer:   the mass of the planet´s water would be   2.9863 x 10¹⁹ kg.