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jannatbibix
08.03.2021 •
Mathematics
What two number multiply to -3, but add to -2
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Ответ:
-3 and 1
Step-by-step explanation:
-3 x 1 = -3
-3 + 1 = -2
Ответ:
-3 and 1.
Step-by-step explanation:
-3 + 1 = -2
-3 * 1 = -3.
Ответ:
Option C
Step-by-step explanation:
Let X be a discrete random variable that counts the number of siblings a randomly selected student has. Then the expected value of X is defined as:
Where
is the probability that a randomly selected student has
siblings
With![i = \{0,1, 2, 3, 4, 5\}](/tpl/images/0174/1489/e3f09.png)
So in this case we know that
#of siblings 0 1 2 3 4 5
probability 0.20 0.65 0.08 0.04 0.02 0.01
Therefore:
The answer is the option C.