Assume that when adults with smartphones are randomly selected, 65% use them in meetings or classes. If 30 adult smartphone users are randomly selected, find the probability that exactly 20 of them use their smartphones in meetings or classes.

Answer : Given : Probability of success $(p) = 0.65%$ Sample size $(n) = 30$ Solution : → The Probability of Exactly 20 Adults Using Smartphones : $$\text{P}(x = 20) = \binom{n}{x} \cdot p^{x} \cdot (1-p)^{n-x}$$ $$= \binom{30}{20} \cdot 0.65^{20}…

In testing a new drug, researchers found that 40% of all patients using it will have a mild side effect. A random sample of 12 patients using the drug is selected. Find the probability that more than 4 patients will have this mild side effect.

The probability that more than 4 patients will have this mild side effect is ___. (Round to three decimal places as needed.) Answer:Given: Probability of success $(p)=0.40$ Sample size $(n)=12$ Solution:The probability that more than 4 patients will have this…

In testing a new drug, researchers found that 30% of all patients using it will have a mild side effect. A random sample of 20 patients using the drug is selected. Find the probability that more than 8 patients will have this mild side effect.

The probability that more than 8 patients will have this mild side effect is ___. (Round to three decimal places as needed.) Answer:Given: Probability of success $(p)=0.30$ Sample size $(n)=20$ Solution:The probability that more than 8 patients will have this…

In testing a new medication, researchers found that 15% of all patients using it will have a mild side effect. A random sample of 25 patients using the medication is selected. Find the probability that more than 5 patients will have this mild side effect.

The probability that more than 5 patients will have this mild side effect is ___. (Round to three decimal places as needed.) Answer:Given: Probability of success $(p)=0.15$ Sample size $(n)=25$ Solution:The probability that more than 5 patients will have this…