question archive Martin Coleman, credit manager for Beck's knows that the company uses three methods to encourage collection of delinquent accounts
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Martin Coleman, credit manager for Beck's knows that the company uses three methods to encourage collection of delinquent accounts. From past collection Records, he learns that 70% of the accounts are called on personally, 20% are phoned and 10% are sent a letter. The probabilities of collecting an overdue amount from an account with the three methods are 0.75,0.60 and 0.65 respectively. Mr. Coleman has just received payments from a past due account. What is the probability that this account
(a) was called on personally
(b) received a phone call
(c) received a letter
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