a) Given that X∼N(18,22)  Find, (i) P(X<25) Answer:Round your answer to 4 decimal places.   (ii) P(X<12) Answer:Round your answer to 4 decimal places.   (iii) P(X<12.4) Answer:Round your answer to 4 decimal places.

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A: To find the these critical values we will use excel function.

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Q: If P(A) = 0.5 and P(B) = 0.80, then P(A or B) must be 0.95.   TRUE or FALSE

A: From the provided information, P (A) = 0.5 and P (B) = 0.80

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A: Compute n(A) as follows.Assume a set B with 20 elements.B = {1,−1, 2, −2, 3, −3,......10, −10}.

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