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Ber [7]
3 years ago
5

How do you solve 2 7/10+ 2 4/5?

Mathematics
1 answer:
nata0808 [166]3 years ago
7 0
2 7/10+ 2 4/5
=27/10+14/5
=27/10+28/10
=55/10
=5 5/10
=5 1/2
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Answer:

Probability that 100 or fewer of these Americans could only converse in one language is 0.8599.

Step-by-step explanation:

We are given that a recent study reported that 73% of Americans could only converse in one language.

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Let \hat p = <u><em>sample proportion of Americans who could only converse in one language.</em></u>

The z score probability distribution for sample proportion is given by;

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where, p = population proportion of Americans who could only converse in one language = 73%

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           n = sample of Americans = 130

Now, probability that 100 or fewer of these Americans could only converse in one language is given by = P( \hat p \leq 0.77)

      P( \hat p \leq 0.77) = P( \frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } } \leq \frac{0.77-0.73}{\sqrt{\frac{0.77(1-0.77)}{130} } } ) = P(Z \leq 1.08) = <u>0.8599</u>                    

The above probability is calculated by looking at the value of x = 1.08 in the z table which has an area of 0.8599.

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Answer:

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Step-by-step explanation:

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