In the original Monty Hall problem, switching makes you twice as likely to win.

There you go, @Evelyne Vincent 😉 Evelyne’s screaming as she passes, “Where on earth’s my pair of glasses?” She scans her pants and her suits, Her left shoe, right shoe, and her boots. Her coats, her shirts and so much more, ‘Til everything is on the floor. “Terrible! Shocking! Foul!” She gnashes. “Someone’s stole my pair of glasses!’ She snorts as she looks everywhere. Under the sofa, here and there. Up the chimney, looking twice. The piano, even checks the mice! She rips the floorboards with a groan. She’s going to give the police a phone. But before she dials, she sees the mirror. And then… well, things could not be clearer. She found her specs. It clearly shows, They’re there, on the end of her nose! Based on the poem: The glasses/spectacles by Julian Tuwim