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A mall order computer software business has sik telephone lines. Let x denote the number of ines in use at a specified time.
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o 0.J2 I 0-13 0.20 3 023 2. 30.24 О 22 50.0구 6 0 03 Mean of x is, 22o - 2.63 Voaarme of x is 22 0 9.4s , standard divinhon=Nob, sinme 2633.06 PC Χ<_6.ss) + P(X > 11.8D -o to ( sive possible walues of X betvern oto 6.

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