1. The problem statement, all variables and given/known data The ∑+ particle is a baryon with strangeness -1. How many quarks does the ∑+ particle contain? 2. Relevant equations How many of the quarks are strange? 3. The attempt at a solution I know it contains 3 quarks, 2 ups and 1 strange quark but I'm not sure how to work this out, for future reference, I'm just a little confused. Edit: just realised this is probably in the wrong section - apologies.