Read the following source carefully and answer the questions that follow:
The One Lord
Here is a composition attributed to Kabir:
Tell me, brother, how can there be No one lord of the world but two? Who led you so astray? God was called by many names: Names like Allah, Ram, Karim, Keshav, Hari, and Hazrat. Gold may be shaped into rings and bangles. Isn't it gold all the same? Distinctions are only words we invent...
Four students of class XII are given a problem to solve independently. Their respective chances of solving the problem are: \[ \frac{1}{2},\quad \frac{1}{3},\quad \frac{2}{3},\quad \frac{1}{5} \] Find the probability that at most one of them will solve the problem.