xxx: I saw a list on a website. He fell from the chair:
Mathematical Olympiads:
Vladimir Volfovich Uhlivodsky was voted by 1% of the literate population and 99% of the literate population. Prove that if Vladimir Volfovich shot 35% of the literate population, he would get at least 60% of the votes.
In the US presidential election, Barack Obama was voted by 10% of the Russian-speaking population, but 90% of the Jews. Prove that, contrary to popular belief, most Russians in America are not Jews.
3) A representative of the progressive youth movement bought 1 ton of grass. After drying, 1/5 he gave to friends, 2/3 of the remaining - sold. In the end, he had 100 kg left. How much of the mass in the purchased grass was occupied by water?