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Julia has 2 chemistry books and 3 math books. In her rush to get to class, she grabs one book, then a second book, without stopping to look. What is the probability that she pulls a math book out first
Lee Hesselden
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Dec 14, 2023
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Julia has 2 chemistry books and 3 math books. In her rush to get to class, she grabs
one book, then a second book, without stopping to look. What is the probability that
she pulls a math book out first and a chemistry book out second?
Mathematics
high-school
Lee Hesselden
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Dec 14, 2023
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Lee Hesselden
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There is a 3/10, or 30% chance that she pulls a math book out first and a chemistry book out second.
(2 + 3) = 5 books total. This means 2/5 are chemistry and 3/5 are math. If she pulls one book out, then another… it means she’ll have one less book to grab from.
This is represented by:
(3/5)x(2/4)= 3/10
EMBarbosa
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Dec 20, 2023
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EMBarbosa
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