Can anyone explain 19,21, and 22

Jay · 4 Jul 2025

Q19 me total 8 Ladies and 7 gents diye hai, aur usme se 3 Ladies aur 7 gents select karne hai. Condition bhi di gayi hai ki agar miss x select hongi toh mr y nhi honge select OR mr y select honge toh mr x select nhi hongi. Ans =1C1×7C2 honga for Ladies (1c1 for Mrs x and rest of all other in 7c2)AND gents me 7-1C4 honga kyuki miss x select hongi aur mr y nhi OR 8-1C3 miss x select nhi hongi AND 7C4 honga kyuki all gents select honge. So both conditions 315+1225=1540