Question 364999

7 have black hair and 17 have not black hair.

no. of ways to choose 2 girls from 24 = 24C2 

(i) no. of ways to choose 2 black hair girl = 7C2 


 probability = 7C2 / 24C2  


(ii) no. of ways to choose 2 non-black hair girl = 17C2


probability = 17C2 / 24C2