There are 1000 passengers in a train 200 passengers get down at one station and 50 people board at the same station. In the next station 100 passengers get down and no passengers board the train. How many passengers are there in total?

Question

$\begin{array}{11} (a)\; 700 \\ (b)\; 850 \\ (c)\; 750 \\ (d)\; 800\end{array}$