• CelloMike@lemmy.world
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    24 hours ago

    B

    The four answers sum to 100%, so on average each answer has a 25% chance of being right, and 25% is two of the options so you have a 50% chance of picking one of those

    • wintermute@discuss.tchncs.de
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      15 hours ago

      What the question is asking for, is an answer where the value and the chance of choosing it at random are the same.

      None of the answers satisfy that condition, because you have a 50% chance of choosing 25%, a 25% chance of choosing 50% and a 25% chance of choosing 0%.
      None of the answers match the chance of choosing it.

    • Dettweiler@lemmy.dbzer0.com
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      23 hours ago

      But two of those answers are the same, which reduces the number of possibilities to 3, and 33.3% isn’t an option.

      • Tja@programming.dev
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        22 hours ago

        It doesn’t reduce the numbet of possibilities. If you had 9999 true and 1 false, the chances are not 50/50

        • Dettweiler@lemmy.dbzer0.com
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          14 hours ago

          25% chance that guessing an answer on a 4 answer question will be true. However, two of the answers say 25%, which is 50% of the possibilities, which now invalidates those answers from being correct. With only answer being correct, it invalidates 50% from being the right answer.

      • magnetosphere@fedia.io
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        23 hours ago

        That’s what’s messing with me, too. I am by no means a math genius, but that’s where I get stuck.

    • Zwiebel@feddit.org
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      23 hours ago

      But if 50% is the right answer then you only have a 25% chance of picking that one

    • ergonomic_importer@piefed.ca
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      23 hours ago

      But if the correct answer is 50% and there is only 1/4 chance of choosing that answer at random, you then have a 25% chance of choosing it correctly. So the answer must be 25%, but there is 2/4 chance of choosing that at random so you have a 50% chance of choosing that correctly so the answer is 50%, but there is only a 1/4 chance of…