text: a) P(The same group) = 0.382*0.382 + 0.206*0.206+0.342*0.342+0.069*0.069\n\nb)P(The two are of group A)=0.206*0.206\n\nc)P(exactly one is A) = 2*(0.206*(1-0.206))\n                       =2*0.206*0.794