Answer:5 1/3 times
Step-by-step explanation:
Answer:
9
Step-by-step explanation:
Plug in -2 for x, and -1 for y, and solve:
3x - 4y + 11
3(-2) - 4(-1) + 11
Remember to follow PEMDAS. First, multiply. Remember, that when you multiply:
2 positive signs will result in a positive answer.
1 positive & 1 negative will result in a negative answer.
2 negative will result in a positive answer.
3 * -2 = -6
-4 * -1 = 4
-6 + 4 + 11 = 9
9 is your answer.
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Answer:
e
Step-by-step explanation:
it’s adding a number by itself the same as multiplying it by 2
Answer:
891.25
Step-by-step explanation:
775x0.15=116.25
775+116.25=891.25
Answer: 4.1
Step-by-step explanation:
Given : An urn contains 10 balls with the number ‘5’ printed on them, 6 balls with ‘4’ printed on them, and 4 balls with ‘2’ printed on them.
Total balls = 10+6+4=20
Let A , B and C are the events of drawing ball with the number ‘5’, ball with the number ‘4’ and ball with the number ‘2’ respectively.
Then,
If X is the number observed.
Since ![E[X]=\sum_{i=1}^{n}x_ip_i](https://tex.z-dn.net/?f=E%5BX%5D%3D%5Csum_%7Bi%3D1%7D%5E%7Bn%7Dx_ip_i)
Then,
![E[X]=5\times P(A)+4\times P(B)+2\times P(C)\\\\=5\times 0.5+4\times 0.3+2\times 0.2\\=4.1](https://tex.z-dn.net/?f=E%5BX%5D%3D5%5Ctimes%20P%28A%29%2B4%5Ctimes%20P%28B%29%2B2%5Ctimes%20P%28C%29%5C%5C%5C%5C%3D5%5Ctimes%200.5%2B4%5Ctimes%200.3%2B2%5Ctimes%200.2%5C%5C%3D4.1)
Hence, E[X]=4.1
