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Recent questions tagged aptitude

A population of 200 laboratory mice contains 120 white mice and 80 gray mice. Of the mice, 50 are male and 150 are female. If the events of selecting a male mouse and selecting a white mouse are independent, how many of the mice are white and male? Show your work.
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Help! A teacher bought 12 sheets of stickers to use on the homework of her students. Each sheet had 48 stickers. At the end of the year, the teacher had 123 stickers remaining. Estimate how many stickers the teacher used.
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A teacher bought 12 sheets of stickers to use on the homework of her students. Each sheet had 48 stickers. At the end of the year, the teacher had 123 stickers remaining. Estimate how many stickers the teacher used.
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How many four-digit odd numbers can be formed from the digits 0,1, 2, 3, 5, 7 if each digit can only be used once? Given numbers : 0, 1, 2, 3, 5, 7
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How many four digit numbers can be formed from the digits 1, 3, 5, 7, 8, and 9 where a digit is used at most once if the numbers must be even?
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