Solution: The given random experiment follows Binomial distribution with
Let be the number of adults who use their smartphones in meetings or classes.
Therefore, we have to find:
We know the binomial model is:
Therefore, the probability that fewer than 3 of them is 0.1111
Answer: Choice C.
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Explanation:
The domain is the set of all allowed x inputs.
Here we see that x = -3 is the smallest x value possible as it is from the left-most point. The graph goes on forever to the right, so there is no largest x value. Effectively infinity is the largest x value even though infinity is not a number.
We can say the domain is which can be simplified to
or
In short: x can be -3 or larger.