The probability distribution for a random variable x is given in the table Find the probability that X<=20
2 answers:
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Answer:
x = -10 or x = -3
Step-by-step explanation:
Here, the given equation is
The given equation can be solved by the method of SPLITTING THE MIDDLE TERM
Split 13 in such a way that sum of the terms = 13
and product of the terms = 30
So, the given equation becomes
Here, 10x+ 3x = 13x and 10 x 3 = 30
Now, simplifying the equation,
⇒ either (x+ 10) = 0 ,or (x+ 3) = 0
⇒ x = -10 or x = -3