Answer:
A
Step-by-step explanation:
The perimeter is 30 im pretty sure
Answer:
Follows are the solution to the given point:
Step-by-step explanation:
For option A:
In the first point let z be the number of heads which is available on the first two trails of tosses so, the equation is:
![= \begin{pmatrix} 8\\k-2\end{pmatrix} (\frac{1}{2})^{k-2} (\frac{1}{2})^{10-k} \ \ \ \ \ \ \ \ \ \ \\\\](https://tex.z-dn.net/?f=%3D%20%5Cbegin%7Bpmatrix%7D%208%5C%5Ck-2%5Cend%7Bpmatrix%7D%20%28%5Cfrac%7B1%7D%7B2%7D%29%5E%7Bk-2%7D%20%28%5Cfrac%7B1%7D%7B2%7D%29%5E%7B10-k%7D%20%5C%20%5C%20%5C%20%5C%20%5C%20%5C%20%5C%20%5C%20%5C%20%20%5C%20%5C%5C%5C%5C)
For option B:
![P(X=k | X \geq 2 ) = \sum^{10}_{i=2} \begin{pmatrix} 10-i\\ k-i\end{pmatrix} (\frac{1}{2})^{k-i} (\frac{1}{2})^{10-k}](https://tex.z-dn.net/?f=P%28X%3Dk%20%7C%20X%20%5Cgeq%202%20%29%20%3D%20%20%5Csum%5E%7B10%7D_%7Bi%3D2%7D%20%20%5Cbegin%7Bpmatrix%7D%2010-i%5C%5C%20k-i%5Cend%7Bpmatrix%7D%20%28%5Cfrac%7B1%7D%7B2%7D%29%5E%7Bk-i%7D%20%28%5Cfrac%7B1%7D%7B2%7D%29%5E%7B10-k%7D)
![k= 2,3, 4.........10](https://tex.z-dn.net/?f=k%3D%202%2C3%2C%204.........10)
The Answer is 11.5 because 3•-8=-24+5=-19-4=-23%2 gives you 11.5
81.42
= 81+ 0.42
= 81+ 42/100
= 81+ (42/2) / (100/2)
= 81+ 21/50
= 81 21/50
The final answer is 81 21/50~