Final answer:
The question is about calculating the probability of a random event using the binomial probability formula. It requires determining the likelihood that 19 out of 30 adult smartphone users will use their phones in meetings or classes, assuming the probability of an individual doing so is 59%.
Step-by-step explanation:
The question pertains to finding the probability that exactly 19 out of 30 randomly selected adult smartphone users use their phones in meetings or classes, given that 59% of adults use them in meetings or classes.
This seems like a binomial probability problem where the number of trials is 30 (n=30), the number of successes is 19 (k=19), and the probability of success on a single trial is 0.59 (p=0.59).
To find the probability of exactly 19 successes in 30 trials, the binomial probability formula can be used:
P(X = k) = nCk * p^k * (1-p)^(n-k)
Where:
- nCk is the combination of n items taken k at a time
- p is the probability of success on a single trial
- k is the number of successes
- n is the total number of trials
Calculating this gives us the exact probability of having 19 users using their smartphone during meetings or classes out of a random sample of 30.