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3 years ago

I need help with finding the correct way of order of operations.

Mathematics

2 answers:

goldenfox [79]3 years ago

7 0

First find brackets
Then exponents
Then division or multiplication which ever comes first from left to right
Then addition or subtraction which ever comes first from left to right

Alika [10]3 years ago

5 0

I hope this helps you

6+4×2^3

6+4×8

6+32

38

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3 years ago

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tatiyna

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Nookie1986 [14]

The Solution:

Given:

Required:

Find the standard deviation of the probability distribution.

Step 1:

Find the expected value of the probability distribution.

$E(x)=\mu=\sum_{i\mathop{=}0}^3x_iP_(x_i)$ $\begin{gathered} \mu=(0\times0.25)+(1\times0.05)+(2\times0.15)+(3\times0.55) \\ \\ \mu=0+0.05+0.30+1.65=2.0 \end{gathered}$

Step 2:

Find the standard deviation.

$Standard\text{ Deviation}=\sqrt{\sum_{i\mathop{=}0}^3(x_i-\mu)^2P_(x_i)}$ $=(0-2)^2(0.25)+(1-2)^2(0.05)+(2-2)^2(0.15)+(3-2)^2(0.55)$ $=4(0.25)+1(0.05)+0(0.15)+1(0.55)$ $=1+0.05+0+0.55=1.60$

Thus, the standard deviation is 1.60

Answer:

1.60

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1 year ago

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aleksklad [387]

Answer:

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Step-by-step explanation:

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