Today in the morning a person went to the bank and accepted he filled in the wrong way his request.

Today in the morning a person went to the bank and accepted he filled in the wrong way his request. The manager requests you to help him determine what is the probability for that person to fill his request on purpose. And the manager hopes you help him take a decision of to grant him or not the requested credit, in case you grant it, could it represent a good income for the bank. Should the credits manager authorize the request? why?

*Use the bayes theorem for an easier way to solve it