Probability

# Why do pennies land heads up?

012 ###### 2012-11-28 16:19:21

Luck of the flip, but they do not always land heads up.

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## Related Questions Ten pennies lined up in a line can show the same number of heads/tails patternsas the highest binary number you can count to with ten bits.That's 1,024 . Each time you toss two pennies, there are four ways they can land: H H H T T H T T One of the four ways is (Heads - Heads), so the probability of 2 heads is 1/4 or 25% . If the pennies are 'fair' (not loaded), and you toss them a large number of times, you should expect 2 heads roughly 1/4 of the time. Out of 20 tosses, that's 5 times. But don't bet on it. No, when you toss a coin there is a 50 percent chance it will land heads up.  There are two answers to this question. If it can only land on heads or tails up, then there is a 50% chance ( or half a chance) it will land heads up, but that's not necessarily true. But, if it can land on heads, tails, or sides, then there is a 16% chance it will land tails up. No matter how many or few pennies were made, if you find one in the street, it must be eitheer head up or tail up. A roll of pennies (there are 50 pennies to a roll). For each toss, the probability that it'll land heads up is 1/2 So 1/2 * 1/2 * 1/2 = 1/8, or .125 There is a 12.5% chance that it will land heads-up all 3 times. The probability of a coin landing on heads is 0.5. It does not matter which toss it is, and it does not matter what the toss history was. There are four different ways that two coins can land: T T T H H T H H. Only one of them is two heads, so if the coins are fair, then the probability is 1/4 = 25% . No. There are 2 sides of the coin, so it's a 50 50 chance. There is an equal oppurtunity for it to land on heads or tails. The probability of heads is 0.5 or 1/2. This is wrong, the chances of a penny landing heads up is less than 0.5 because the cast in Lincoln's head weighs more than the tails side of the peeny.    The probability that a coin will land on heads - at least once - in six tosses is 0.9844  5 times.When tossing 2 pennies there are 4 equiprobable outcomes or events with 1/4 ofprobability for each to happen:P(H,H) = 1/4P(H,T) = 1/4P(T,H) = 1/4P(T,T) = 1/4So if you toss 2 pennies 20 times, the "expected" number of times that 2 heads (H,H)will come up is 1/4 of the 20 times, that is 5 times. the probability is actually not quite even. It would actually land heads 495 out of 1000 times because the heads side is slightly heavier The probability that the coin will land on heads each time is 1/2. (1/2) to the tenth power is 1/1024. This is the probability that the coin will not land on heads. Subtract it from one to get the probability that it will : 1-(1/1024)There is a 1023/1024 or about 99.90234% chance that the coin will land on heads at least once.(There is a 1/1024 chance that the coin will land on heads all four times.)  There is a 50% chance that it will land on heads each toss. You need to clarify the question: do you mean what is the probability that it will land on heads at least once, exactly once, all five times?  if 500 pennies make up \$5 then 1,000,279 make up 180,619 You don't. Wait for the heads to strike out at you, then jump up and land on top fo them. Repeat for all 5 heads, then get a scale from the Hydra.

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