Match the scale drawing area and the actual area to the correct scale.

Mathematics

2 answers:

sasho [114]3 years ago

8 0

Answer:helllo

Step-by-step explanation:

german3 years ago

5 0

Answer:

13:117 = 1:3

5:125 = 1:5

8:128 = 1:4

12:48 = 1:2

Step-by-step explanation:

117/13 = 9

√9 = 3

125/5 = 25

√25 = 5

128/8 = 16

√16 = 4

48/12 = 4

√4 = 2

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AlladinOne [14]

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Step-by-step explanation:

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What is the formula for the expected number of successes in a binomial experiment with n trials and probability of success p? C

charle [14.2K]

Answer:

$(D)E[ X ] =np.$

Step-by-step explanation:

Given a binomial experiment with n trials and probability of success p,

$f(x)=\left(\begin{array}{c}n\\k\end{array}\right)p^x(1-p)^{n-x}, 0\leq x\leq n$

$E(X)=\sum_{x=0}^{n}xf(x)= \sum_{x=0}^{n}x\left(\begin{array}{c}n\\k\end{array}\right)p^x(1-p)^{n-x}$

Since each term of the summation is multiplied by x, the value of the term corresponding to x = 0 will be 0. Therefore the expected value becomes:

$E(X)=\sum_{x=1}^{n}x\left(\begin{array}{c}n\\x\end{array}\right)p^x(1-p)^{n-x}$

Now,

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