Which statements are true about car color? Choose four correct answers. White is the most popular in every region. Red is the mo
st popular in the East than in the other regions. About 23% of the people in the West have a green car. About 17% of the people in the Midwest have a gray car. Silver and black are equally popular in the East.
2 answers:
You might be interested in
Answer:
The probability that at least 4 of them use their smartphones is 0.1773.
Step-by-step explanation:
We are given that when adults with smartphones are randomly selected 15% use them in meetings or classes.
Also, 15 adult smartphones are randomly selected.
Let X = <em>Number of adults who use their smartphones</em>
The above situation can be represented through the binomial distribution;
where, n = number of trials (samples) taken = 15 adult smartphones
r = number of success = at least 4
p = probability of success which in our question is the % of adults
who use them in meetings or classes, i.e. 15%.
So, X ~ Binom(n = 15, p = 0.15)
Now, the probability that at least 4 of them use their smartphones is given by = P(X 4)
P(X 4) = 1 - P(X = 0) - P(X = 1) - P(X = 2) - P(X = 3)
=
=
= <u>0.1773</u>