Answer:
13.8%
Step-by-step explanation:
P = nCr pʳ qⁿ⁻ʳ
P = ₉C₅ (0.37)⁵ (1−0.37)⁹⁻⁵
P ≈ 0.138
Answer:
x=20
Step-by-step explanation:
inverse operation
add 7 to both sides
x=20
Answer:
Probability is: ![$ \frac{\textbf{13}}{\textbf{51}} $](https://tex.z-dn.net/?f=%24%20%5Cfrac%7B%5Ctextbf%7B13%7D%7D%7B%5Ctextbf%7B51%7D%7D%20%24)
Step-by-step explanation:
From a deck of 52 cards there are 26 black cards. (Spades and Clubs).
Also, there are 26 red cards. (Hearts and Diamonds).
First, we determine the probability of drawing a black card.
P(drawing a black card) =
![$ = \frac{26}{52} = \frac{\textbf{1}}{\textbf{2}} $](https://tex.z-dn.net/?f=%24%20%3D%20%5Cfrac%7B26%7D%7B52%7D%20%3D%20%5Cfrac%7B%5Ctextbf%7B1%7D%7D%7B%5Ctextbf%7B2%7D%7D%20%24)
Now, since we don't replace the drawn card, there are only 51 cards.
But the number of red cards is still 26,
∴ P(drawing a red card) =
![$ = \frac{26}{51} $](https://tex.z-dn.net/?f=%24%20%3D%20%5Cfrac%7B26%7D%7B51%7D%20%20%24)
Now, the probability of both black and red card =
![$ = \frac{\textbf{13}}{\textbf{51}} $](https://tex.z-dn.net/?f=%24%20%3D%20%5Cfrac%7B%5Ctextbf%7B13%7D%7D%7B%5Ctextbf%7B51%7D%7D%20%24)
Hence, the answer.