There are six different fruits on the table. For the salad you need to choose any two of them. How many different pairs of fruits can you choose?
Show hints
- Make pairs and ignore the order of the fruits.
- Divide the product 6 × 5 by 2 to remove repetitions.
Show the answer and solution
Answer: 15
The first fruit can be combined with five others, but then each pair is counted twice. We get 6 × 5 ÷ 2 = 15 pairs.