Only the Smartest People Get This Right! 🤔

The killer then kills 30 people, but the question asks how many people are still in the room, not how many are still alive.

The 30 victims are still in the room, along with:

• You
• The killer
• The remaining 20 living people

So:

• 30 victims
• 20 survivors
• You (1)
• The killer (1)

Total: 52 people still in the room.