Amarketing firm would like to test-market the name of a new energy drink targeted at 18- to 29-year-olds via social media. suppose a study found that 36% of adults (18 and older) do not use social media. suppose the percentage of adults age 30 and older is 75%. suppose that the percentage of the adult population that is either age 18–29 or uses social media is 66.7%. (a) what is the probability that a randomly selected adult uses social media?

The probability of randomly select an adult that has between 18 and 29 years old and use social media is 22.3%

Step-by-step explanation:

As the test is targeted to 18-to-29-year-old adults using  social media, we want to know the probability that a randomly selected adult uses social media and belong to the study group.

To achieve this, we have this data:

- 36% of all adults do not use social media

- 75% of all adults are >30 years old.

- The percentage of population that is either 18-29 years old or uses social media is 66.7%

Using the last data we have that

The probability of randomly select an adult that has between 18 and 29 years old and use social media is 22.3%

t = 3

step-by-step explanation:

put t = 3 in this expression :

(3²-1)(3²-2)(3² - 3)(3² - 4) = 8×7×6×5 = 56×30 = 1680