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The probability P(c < x < d) is the area under the curve, above the x-axis, and:
ARight of c, left of d
BLeft of c, right of d
CRight of both c and d
DLeft of both c and d
Answer & Solution
Correct answer: A. Right of c, left of d
1. Interval probability is read off the picture directly.
2. P(c < x < d) is the area under the curve, above the x-axis.
3. That area lies to the right of c and to the left of d.
4. It is the strip of the curve between the two values.
_Source: OpenStax Introductory Statistics 2e (CC BY 4.0), Ch 5 'Continuous Random Variables', sections 5.1-5.3_
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