Mayco, a Mail-Order Department Store, Has Six Telephone Lines Available

Short Answer

Mayco, a mail-order department store, has six telephone lines available for customers who wish to place their orders.
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If the probability that during business hours any one of the six telephone lines is engaged is , find the probability that when a customer calls to place an order all six lines will be in use. Round the answer to four decimal places, if necessary.
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The probability is __________.