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2 years ago

Are the ratios 11:9 and 2:1 equivalent? yes or no

Mathematics

2 answers:

tresset_1 [31]2 years ago

7 0

Answer:

yes

Step-by-step explanation:

vampirchik [111]2 years ago

3 0

Answer:

Step-by-step explanation:

We can determine if they are equivalent if the cross products are equal

11 2

----- = ------

9 1

11*1 = 2*9

11 = 18

This is false so the ratios are not equivalent

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Events a, b, and c in a sample space have p(a)=0.2, p(b)=0.4, and p(c)=0.1. find p(a ∪ b ∪

Julli [10]

If $A$ and $B$ are mutually independent, then $\mathbb P(A\cup B)=\mathbb P(A)+\mathbb P(B)$ and $\mathbb P(A\cap B)=0$ .

If $A$ and $C$ are independent, then $\mathbb P(A\cap C)=\mathbb P(A)\cdot\mathbb P(C)$ . Ditto for $B$ and $C$ .

The inclusion/exclusion principle says that

$\mathbb P(A\cup B\cup C)=\mathbb P(A)+\mathbb P(B)+\mathbb P(C)-\mathbb P(A\cap B)-\mathbb P(A\cap C)-\mathbb P(B\cap C)+\mathbb P(A\cap B\cap C)$

Since $A$ and $B$ are mutually exclusive, their intersection is the empty set. It then follows that $A\cap B\cap C$ also is the empty set, so the last probability is also 0.

Plug in what we know:

$\mathbb P(A\cup B\cup C)=0.2+0.4+0.1-0-0.2\cdot0.1-0.4\cdot0.1+0$

$\implies\mathbb P(A\cup B\cup C)=0.64$

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2 years ago

Hi if you know 8th grd math pls help

Kryger [21]

Answer:

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Step-by-step explanation:

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2 years ago

What is the measure of XYZ? А. 74° В. 296° с. 32° D. 148°

LenaWriter [7]

Answer:

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Step-by-step explanation:

∠XYZ = $\frac{1}{2}$ arcXZ

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Okay so you have the question What is 1.06 as a mixed number in simplest form?
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Belive1234

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