This is how many total ways:
C(10,2)*C(8,2)*C(6,2)*C(4,2)*C(2,2)/2^5
This is the probability each pair matches:
(1*1/9)*(1*1/7)*(1*1/5)*(1*1/3)*(1*1/1)
Time these two together is the answer
This is how many total ways:
C(10,2)*C(8,2)*C(6,2)*C(4,2)*C(2,2)/2^5
This is the probability each pair matches:
(1*1/9)*(1*1/7)*(1*1/5)*(1*1/3)*(1*1/1)
Time these two together is the answer
• 这个很靠谱。非常感谢! -楚山秋- ♀ (0 bytes) () 12/27/2021 postreply 21:24:38