The Probability That a Call Received by a Certain Switchboard

question 177

Multiple Choice

The probability that a call received by a certain switchboard will be a wrong number is 0.02.Use the Poisson approximation to the binomial distribution to find the probability that among 140 calls received by the switchboard,there are at least two wrong numbers.

• A)0.5305
• B)0.7616
• C)0.7689
• D)0.2384
• E)0.2311

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