Answer:
r
(
x
2
+
5
)
=
√
x
2
+
8
Step-by-step explanation:
<h2>
Answer:</h2>
The probability is:

<h2>
Step-by-step explanation:</h2>
It is given that:
An urn contains balls numbered 1 through 20.
A ball is chosen, returned to the urn, and a second ball is chosen.
This means that this is a case of a replacement.
Hence, one of the event is independent of the other.
Now we know that the probability to get a particular number of ball is:

( Since, there are total 20 balls and a ball of one particular number is just unique )
i.e. 
Hence, the probability that the first and second balls will be a 8 is:

1911.4849 approx
Mark brainliest please
Answer:
There is not enough information to answer this question. Is there perhaps a diagram or table provided?
Step-by-step explanation:
ANSWER(S):
-7
EXPLANATION(S):
original position: 7
change from original position: -7