To get percentage u take the percent u are trying find and divide it by 100 like 98percent and u get .98 then u would multiply .98 by 192 and u get 188.16 u do the same with the next two and u get 66.34 , 39.48

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4 years ago

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About 7% of the population of a large country is nervous around strangers. If two people are randomly selected, what is the prob

chubhunter [2.5K]

Answer:

Probability both are nervous around strangers = 0.0049

Probability at least one is nervous around strangers = 0.1302

Step-by-step explanation:

Let probability a person selected in the population is nervous around strangers = P

P = 7%

P = $\frac{7}{100}$

P = 0.07

Let probability a person selected in the population is not nervous around strangers = P'

P' = 1 - P

P' = 1 - 0.07

P' = 0.93

(i) probability of the first person selected is nervous around strangers = P

probability of the second person selected is nervous around strangers = P

Probability both are nervous around strangers = (P × P)

= 0.07 × 0.07

= 0.0049

(ii) Probability at least one is nervous around strangers = ( probability the first person is nervous around strangers AND the second person is not nervous around strangers ) OR ( probability the second person is nervous around strangers AND the first person is not nervous around strangers)

This implies,

Probability at least one is nervous around strangers = (P × P') or (P × P')

= (0.07 × 0.93) + (0.07 × 0.93)

= 0.0651 + 0.0651

= 0.1302

5 0

4 years ago