Continuity mistake: In season 2's episode "The Ricardos Change Apartments" their new apartment number is "3B", but in this episode when Lucy's at her audition she tells the casting agent that her apartment number is "3D" (deliberately done in order for the 3D joke to work), and it's in the next episode "The French Revue" that we see the new number "3D" on the door. (00:19:30)
I Love Lucy (1951)
1 continuity mistake in Lucy Tells the Truth
Starring: Lucille Ball, Desi Arnaz, Vivian Vance, William Frawley

Lucy Gets Ricky on the Radio - S1-E32
Visible crew/equipment: At the start, after Fred and Ethel walk in, when Lucy and Ethel walk away from the kitchen shutters carrying things, the stage microphone and stand can be seen at the right side of the screen. (Later in the episode, when Lucy and Ricky appear in the quiz segment an identical microphone is on stage with them). (00:00:35)
Lucy Ricardo: How much do you want to bet?
Fred Mertz: Ten dollars.
Ethel Mertz: Well what's the matter with twenty dollars?
Ricky Ricardo: What's the matter with thirty dollars?
Lucy Ricardo: What's the matter with fifty dollars?
Fred Mertz: What was the matter with ten dollars?
Trivia: It was the first to tape before a live audience.





Answer: There is no reason. It's a just a silly plot device, typical of the era. Women characters were often portrayed as making uninformed assumptions or decisions.
raywest ★