Solve m+7=8 What dose m =
1 answer:
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Answer:
Option B that is (2,6) is correct
Explanation:
We have been given with system of equations
and
Here, we will substitute the value of in
We will get
Further simplification we will get to
Hence, the value of
And now, substituting the value in
we will get
.
Therefore, option B is correct.
Answer:
Of the 500 parents surveyed 275 would be expected to spank their children.
Step-by-step explanation:
Let the random variable <em>X </em>represent the number of parents who spank their children.
It is provided that, from previous studies, <em>p</em> = 55% of parents spank their children.
A random sample of <em>n</em> = 500 adults were selected.
The event whether a parent spank their children is independent of other parents.
The random variable <em>X </em>thus follows a Binomial distribution with parameters <em>n</em> = 500 and <em>p</em> = 0.55.
The expected value of a Binomial random variable is:
Thus, of the 500 parents surveyed 275 would be expected to spank their children.