Question

From first 10 odd numbers five of them are chosen. What is the probability of their sum being 12?​

Answer 1

Answer:

1,3,5,7,9,11,13,15,17,19 are the first odd numbers.

Five of them are chosen mean

1,3,5,7,9 are chosen

5+7=12

9+3=12

5 and 7

9 and 3 are the numbers which sum up to become 12