You want to pick a four-player tennis team. There are eight players to choose from. How many
different teams can you form?

Answer:
70
Step-by-step explanation:
From 8, we want to choose 4. So:
₈C₄ = 8! / (4! (8-4)!)
₈C₄ = 8! / (4! 4!)
₈C₄ = (8×7×6×5×4×3×2×1) / (4×3×2×1 × 4×3×2×1)
₈C₄ = (8×7×6×5) / (4×3×2×1)
₈C₄ = 70
There are 70 different teams you can form.