How so? Kronos is essentially adding (G and H hit), (G and K hit) and (H and K hit). I don’t see ?how (G, H and K) hit has been counted thrice in that approach.
“G and H hit” itself comprises two sub-cases (“G and H hit and K also hits” which is G*H*K, and “G and H hit but K misses” which is G*H*(1-K)). The former is common to all the three!
regards
J
edit-typos: How so? Kronos is essentially adding (G and H hit), (G and K hit) and (H and K hit). I don’t see how (G, H and K hit) has been counted thrice in that approach.
CAT-holics 
hey J …In the 4th question, why do we take complement of the person….what is wrong with G*H+G*K+H*K?
You could do that, but then you would need to subtract G*H*K 3 times as you have counted it in each of those three.
regards
J
How so? Kronos is essentially adding (G and H hit), (G and K hit) and (H and K hit). I don’t see ?how (G, H and K) hit has been counted thrice in that approach.
“G and H hit” itself comprises two sub-cases (“G and H hit and K also hits” which is G*H*K, and “G and H hit but K misses” which is G*H*(1-K)). The former is common to all the three!
regards
J
edit-typos: How so? Kronos is essentially adding (G and H hit), (G and K hit) and (H and K hit). I don’t see how (G, H and K hit) has been counted thrice in that approach.
Nevermind..got it!