<h3>
Answer: 7/13</h3>
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Explanation:
We know that the marble selected is red, so we don't need to focus on the other colors.
7 red marbles are in urn B out of 2+7+4 = 13 total red marbles.
The probability the red marble came from urn B is therefore 7/13
im sure it would be 2:4. if it was to be simplified it would be 1:2
Answer:
-20 m/s.
Step-by-step explanation:
The computation of the average speed is shown below:
Given that
The initial velocity of the bus, u = 20 m/s
Aceleration of the bus, -a = 8 m/s²
time of motion, t = 5 s
Now The final velocity of the bus is
v = u + at
v = 20 + (-8 × 5)
v = 20 - 40
v = -20 m/s.
P(r/w) is the probability of picking a red rose at first picking and a white rose at second picking.
P(w/r) is the probability of picking a white rose at first picking and a red rose at second picking.
P(r/w) =
![\frac{11}{19}](https://tex.z-dn.net/?f=%20%5Cfrac%7B11%7D%7B19%7D%20)
×
![\frac{8}{18}](https://tex.z-dn.net/?f=%20%5Cfrac%7B8%7D%7B18%7D%20)
=
![\frac{88}{342}](https://tex.z-dn.net/?f=%20%5Cfrac%7B88%7D%7B342%7D%20)
P(w/r) =
![\frac{8}{19}](https://tex.z-dn.net/?f=%20%5Cfrac%7B8%7D%7B19%7D%20)
×
![\frac{11}{18}](https://tex.z-dn.net/?f=%20%5Cfrac%7B11%7D%7B18%7D%20)
=
![\frac{88}{342}](https://tex.z-dn.net/?f=%20%5Cfrac%7B88%7D%7B342%7D%20)
Notice that the second fraction is out of 18 because the second picking of rose will be out of 18 since the first rose is not replaced.
P(r/w) equals to P(w/r)