Dhindora song piano - How to play dhindora song on piano - BB ki vines #shorts #dhindora #short

Your friend is playing a song on a piano. Whenever your friend hits a certain key, the lamp on top of the piano rattles. Explain why the lamp rattles.

In a class of 40 students, 24 like to play guitar and 25 like to play piano. If each students like at least one of the musical instrutment, then how many like to play both piano and guitar?