# Students are chosen in groups of 6 to tour a local business. How many ways can 6 students be selected from 3 classes totaling 53 students?

$22.16 \times {10}^{9}$
The way to find how many possibilities there are is by taking the number of items - $53$ - and putting it to the power of how many are chosen - $6$ -.
For example a $3$ digit code which could have the numbers $0 \to 9$ would have ${10}^{3}$ possibilities.
${53}^{6} = 22.16 \ldots \times {10}^{9}$