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Methods2024 Exam 2 Section A · Q19CAS active1 mark

Normal probability from symmetric tail probabilities

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Consider the normal random variable $X$ that satisfies $\Pr(X < 10) = 0.2$ and $\Pr(X > 18) = 0.2$ .

The value of $\Pr(X < 12)$ is closest to

1 mark

A

0.134

B

0.297

C

0.337

D

0.365

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