The gardener mixed up the petunias he bought at the plant shop. None of them are blooming, but she knows she bought 3 purple, 15 red, and 13 white. if he just selects one at random, what is the probability that it is red?
explain.
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OpenStudy (anonymous):
@mathmath333
OpenStudy (mathmath333):
i think it should be
\(\Large P(\color{red}{red})=\dfrac{no~of~\color{red}{red}~flowers}{\tt \text{total number of flowers}}\)
OpenStudy (anonymous):
15/28 ???
Directrix (directrix):
Check the total number of flower plants again.
OpenStudy (anonymous):
yeah i tried doing it in my head lol
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OpenStudy (anonymous):
and i didnt add the 3
Directrix (directrix):
>>> 15/28 ???
So, what should that be?
OpenStudy (anonymous):
its a really big decimal.....
Directrix (directrix):
As a fraction first.
OpenStudy (anonymous):
0.535714286
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Directrix (directrix):
15 over what?
OpenStudy (anonymous):
is what i got
OpenStudy (anonymous):
15/28
Directrix (directrix):
28 is not correct for total flowers
OpenStudy (anonymous):
well mathmath told me to add all of the numbers
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OpenStudy (anonymous):
so thats how i got a denominator of 28
Directrix (directrix):
Yes. I think there is an error in the sum:
3 + 15 + 13 = what
OpenStudy (anonymous):
31
OpenStudy (mathmath333):
so it should be \(P(red)=15/31\)
OpenStudy (anonymous):
so is it 15/31 or not??
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