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0 / 60 seg.
In a certain city, 5% of all the persons in town have unlisted phone numbers. If you select 100 names at random from that city's phone directory, how many people selected will have unlisted phone numbers?
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Clue
THE FIRST CUBE HAS THE NUMBERS: 012345. THE SECOND CUBE HAS THE NUMBERS: 012678. THE NUMBER '6' CAN BE USED FOR BOTH '6' AND '9'
2 1/2 TIMES (5/2, NOT 6/3)
"SIX DOZEN DOZEN" IS GREATER. "SIX DOZEN DOZEN" IS 6 X 12 X 12. "HALF DOZEN DOZEN" IS 1/2 X 12 X 12
NONE. AN UNLISTED PHONE NUMBER DOESN'T APPEAR IN THE PHONE BOOK
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