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trillralyn4060
16.12.2020 •
Mathematics
Please I need this ASAP
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Ответ:
26 cm
Step-by-step explanation:
just use Pythagoras theorem
c2 = a2 + b2
c2 =
+ ![24^{2}](/tpl/images/0989/2794/be725.png)
c2 = 100 + 576
c2 = 676
shift the square to the other side and it becomes a square root
c =![\sqrt{676}](/tpl/images/0989/2794/3d9b2.png)
c = 26
AC = 26 cm.
Ответ:
The probability is 0.5714
Step-by-step explanation:
Let's call W the event that the chip transferred is white, W' the event that the the chip transferred is red and R the event that a red chip is selected from urn II.
So, the probability that the chip transferred was white given that a red chip is selected from urn II is:
P(W/R) = P(W∩R)/P(R)
Where P(R) = P(W∩R) + P(W'∩R)
Therefore, the probability that the chip transferred is white is P(W) = 2/3, because on urn I, there are 3 chips and 2 of them are white.
If the chip transferred is white, the probability of select a red chip from urn II is P(R/W) = 2/4, because there are now 4 chips on urn II and 2 of them are red.
Finally, P(W∩R) = P(W)*P(R/W) = 2/3*2/4 = 1/3 = 0.3333
At the same way, The probability that the chip transferred is red is P(W') = 1/3 and the probability of select a red chip from urn II given that the chip transferred is red is P(R/W') = 3/4.
Finally, P(W'∩R) = P(W')*P(R/W') = 1/3*3/4 = 1/4 = 0.25
So, P(R) and P(W/R) are calculated as:
P(R) = 0.3333 + 0.25 = 0.5833
P(W/R) = 0.3333/0.5833 = 0.5714