What are the 2 most common exponents you will deal with when finding roots?
1 answer:
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Answer:
Step-by-step explanation:
Hello,
as the mean age of 5 people is 40
it means that the sum of the 5 ages is 40*5=200
now a person enters the room, let's note x his age
the new mean is
So the age of the new person is 16
hope this helps
x = 26. I hope this helped
Answer:
Step-by-step explanation:
a) Two events A,B are said to be mutually exlusive if any of the following occurs.
- A and B have an empty intersection
- A= B^c and their union is the whole sample space
- P(A intersection B) =0
REcall the following formula
Note that P(A) + P(B) = 1.1. Since the probability is always a number between 0 and 1, it must happen that , otherwise,
would have a probability greater than 1. Hence, A, B are not mutually exclusive.
b) by definition, if two events are indepent, we have that the probability of the intersection is equal to products of their probabilites. Or
c) Recall that if we have mutuallly exclusive events A, B, then we have that , if they were independent, we would have the following
which necesarilly implies that at least one of the two events has 0 probability. (THis is not the case)