Nina graduated from college with 138 credits after passing 40 courses. If each of the courses she passed was worth 3 credits or 4 credits, which of these statements is correct?
-22 of the courses Nina passed were worth 3 credits each.
-Nina earned a total of 54 credits from 4-credit courses.
-22 of the courses Nina passed were worth 4 credits each.
-Nina earned a total of 54 credits from 3-credit courses.
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