How many people have to be in a room to have a 50% probability of at least two people having the same birthday? There are 23 people in this class. What is the probability that at least 2 of the people in the cl
Some- one wants to bet you $10 that there are two people with exactly the same birthday. Should you take the bet? To pose a mathematical problem, we ignore Feb. 29 which only comes in leap years and suppose the each person at the party picks their birthday at random from the calendar...
You really need to factor in the probability of people having the same birthday in your calculations. It makes this problem, at least tangentially, related to the birthday problem. (Although this one is a little more complex) I’ve spent around 4 hours on this so far, and I suspec...
The reason is simply that if any of the above beliefs were wrong then the expert would not have said that the only information they could give was that a 2 [0:1; 1]. If any individual point could be singled out as having positive probability, the expert would have said so. If the ...
The expression is obtained by the following argument. The first person’s birthday can be chosen freely. The second person’s must not be chosen on the same day, so there are 364 possible choices. For the third, there remain 363 choices, and so on until finally, for then th person,...
Determine the approximate probability of exactly two people in a group of seven having the same birthday. In a given year, 2,049,032 males and 2,079,465 females were born in a certain country. If a child is selected randomly from t...
The probability of getting a pair of face cards is less than 5%. Homework Central: Aces in 4 piles, bad ICs, airline overbooking. Binomial distribution. Defective units in a sample of 200. Siblings with the same birthday. What are the odds in a family of 5? Covariance: A generic...
which is pretty much the same answer.But back to the surprising result. Of all people who test positive, over 98% do not have the disease. If your guess for the probability a person who tests positive has the disease was wildly different from the right answer (2%), don’t feel ba...
Life is full of random events!You need to get a "feel" for them to be a smart and successful person.The toss of a coin, throwing dice and lottery draws are all examples of random events.There can be:Dependent Events: what happens depends on what happened before, such as taking cards ...
x and y are chosen randomly between 0 and 3. What is the probability that x + y is between 2 and 4? What is the probability of a person selected at random having matric, or a diploma, or a degree? Assume that a randomly selected student has a 60 percent chanc...