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MariettaO [177]
3 years ago
5

Five twelfths ot the participants at a conference brought laptop computers with them

Mathematics
1 answer:
elena-14-01-66 [18.8K]3 years ago
5 0

The number of participants with laptop is 115 and without laptop is 161

<u>Step-by-step explanation:</u>

Total number of participants= 276

Participants with laptop = (5/12) 276

= 115

Participants without laptop= 276 - 115

= 161

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A marketing firm would like to test-market the name of a new energy drink targeted at 18- to 29-year-olds via social media. A st
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Answer:

(a) The probability that a randomly selected U.S. adult uses social media is 0.35.

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Step-by-step explanation:

Denote the events as follows:

<em>X</em> = an US adult who does not uses social media.

<em>Y</em> = an US adult between the ages 18 and 29.

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(a)

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Thus, the probability that a randomly selected U.S. adult uses social media is 0.35.

(b)

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P (Adults between 18 - 29 (<em>Y</em>)) = 1 - P (Adults 30 or above)

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Thus, the probability that a randomly selected U.S. adult is aged 18–29 is 0.22.

(c)

Compute the probability that a randomly selected U.S. adult is 18–29 and a user of social media as follows:

P (Y ∩ X') = P (Y) + P (X') - P (Y ∪ X')

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Thus, the probability that a randomly selected U.S. adult is 18–29 and a user of social media is 0.198.

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