Learning Resources

Use the triangle below and go to row 3. Click on element number 3 in this row. What is the value? How does it compare to ₃C₂?

Lets try another combination.

Use the triangle above and go to row 6. Click on element number 5 in this row. What is the value? How does it compare to ₆C₄?

For Step B, you should see the relationship between these combinations and Pascal's Triangle. Make a conjecture. Evaluate _nC _r for several other values of n and r and use the triangle to check your conjecture.