Question

Why does we see the water droplets on the outer surface of a glass containing ice cold water ?

Answer 1

We see the water droplets on the outer surface of a glass containing ice cold water because of the latent (hidden) heat applied by the surrounding or the normal room temperature.
The water from the surrounding comes out due to the latent heat of fusion(melting).

Answer 2

we see water droplets on the outer surface of the glass containing ice-cold water this is because the water vapour presents in air, on coming in contact with the cold glass of water, loses energy and gets converted to liquid state, which we see as water droplets.