Mathematics

Boo Boo

10 September, 14:09

An employee of a company gets a three-digit lock code to enter the building the digits could be 1, 5, or 7 identify the lock codes in the sample space that have at least two fives

a.) 155, 551, 555, 557, 755

b.) 155, 515, 551, 557, 575, 755

c.) 155, 515, 551, 557, 575, 755

d.) 115, 151, 155, 157, 175, 511, 515, 517, 551, 555, 557, 571, 575, 577, 715, 751, 755, 757, 775

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