HEREDITY
BASICS OF PROBABILITY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The sun will rise tomorrow
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It will snow today
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You will have two birthdays this year
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You will roll a 4 on a die
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Detailed explanation-1: -Due to probability, sometimes an event is more likely to occur than we believe it to. In this case, if you survey a random group of just 23 people there is actually about a 50–50 chance that two of them will have the same birthday. This is known as the birthday paradox.
Detailed explanation-2: -The first person can be born on any day of the year, this means that the probability is 365/365 = 1. The second person has to be born on the same day as the first and there is a 1/365 chance of that happening.
Detailed explanation-3: -The birthday paradox is a veridical paradox: it seems wrong at first glance but is, in fact, true.
Detailed explanation-4: -The first person covers one possible birthday, so the second person has a 364/365 chance of not sharing the same day. We need to multiply the probabilities of the first two people and subtract from one.