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A bag contains hair ribbons for a spirit rally.The bag contains 3 black ribbons and 12 green ribbons.Lila selects a ribbon at random, then Jessica selects a ribbon at random fro…
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A bag contains hair ribbons for a spirit rally.The bag contains 3 black ribbons and 12 green ribbons.Lila selects a ribbon at random, then Jessica selects a ribbon at random fro…
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Jan 6, 2019
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A bag contains hair ribbons for a spirit rally.The bag contains 3 black ribbons and 12 green ribbons.Lila selects a ribbon at random, then Jessica selects a ribbon at random from the remaining ribbons.What is the probability that Lila selects a black ribbon and Jessica selects a green ribbon?Express your answer as a fraction in simplest form.
A. 4/25
B. 4/35
C. 11/70
D. 6/35
Mathematics
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Antoine
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Note:
3/15 because 3 black ribbons out of 15 total ribbons.
12/14 because 12 green ribbons out of 14 total ribbons after 1 ribbon is taken out, which makes 15-14=1
Answer is D.
Hope this helps. - M
EGC
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Jan 8, 2019
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EGC
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3 black ribbons and 12 green ribbons
so P(
Lila selects a black ribbon)=3/(3+12)
=1/5
2 black ribbons and 12 green ribbons left
P(
Jessica selects a green ribbon)=12/(12+2)
=6/7
so P(
Lila selects a black ribbon and Jessica selects a green ribbon)
=1/5*6/7
=6/35
ans is D
Clhy
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Jan 11, 2019
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Clhy
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