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TIL I te probability of no calls in a five-minute period? 19. Find the area under the curve between 1.78Az=1.92 20. Find the
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Solºg - (22 Find the area under the curve to the right of Z=- 1.28. 998 1018998 P ( 27 – 1.28 ) = - 1-P(Z (1.28) 1 – 0.1002 =

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