Here is a uniform probability distribution.
1 answer:
a) because it is equal to the area of the shaded region between X=4 and X=6, and the probability that X falls within some interval is given by the area under the PDF.
b) because the shaded region is a rectangle of height 1/5 (by virtue of X following a uniform distribution over the interval [2, 7], which has length 5).
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Answer:
Step-by-step explanation:
a=3, b=-15, c=20
Discriminant can be calculated as
The roots are imaginary
The solution is
The roots are not real i.e these are imaginary
a=3, b=5, c=-8
Discriminant can be calculated as
The roots are real
By quadratic formula method
The solution is
which are required roots.
I choose this method because I can get the solutions directly by substituting the values in formula, and I don't have to guess the possible solutions.