Math, asked by soonbok2, 1 year ago

in a sample of 9 blocks, 4 are red. If Sami chooses 2 blocks at random, one at a time without replacement, what is the probability that she chooses 2 red blocks?
A. 1/6
B. 2/9
C. 4/27
D. 4/9

Answers

Answered by TooFree
1

 \textbf {Hey there, here is the solution.}

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Total blocks = 9

Red blocks = 4

P(2 red blocks) = (4/9) (3/8) = 1/6

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Answer: The probability is (A) 1/6

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 \textbf {Cheers}


soonbok2: where did you get the 3/8 from?
TooFree: Because there is no replacement, the number of red blocks will be reduced by 1 and the number of total blocks will also be reduced by 1
TooFree: (4 - 1) / ( 9 - 1) = 3/8
soonbok2: ohh okay thank you!
TooFree: You are welcome :)
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