It's when you throw a coin up and try to pick which side lands facing up - it's a way of choosing between two sides when neither side wants to pick (or when neither one wants to give something up). Each side picks either "heads" (the picture of the person on the coin) or "tails" (the other picture on the coin) and whichever side comes up, the person who picked that side wins.
It means you don't understand something at all.
Referring to coin flipping, heads and tails are not plurals. They are old genitives, and could be written head's and tail's.
Nothing. The correct expression is HEAD AND SHOULDERS above the crowd - it's as if you were so tall that you were that far above everyone else.
The reverse of a coin is called "tails" because the obverse traditionally shows "heads" (relief images of famous people).
Many choices are made using the flip of a coin, because either outcome, heads or tails, has a likelihood of exactly 50%, assuming the coin's center of mass has not been displaced. There are some coins of which it cannot be determined which side is supposed to be the head and which side is supposed to be the tail. It is literally said that someone cannot make heads or tails of such a situation. The phrase is used figuratively in reference to a situation that is equally difficult to determine.
1heads heads heads 2heads heads tails 3heads tails heads 4heads tails tails 5tails tails tails 6tails tails heads 7tails heads tails 8tails heads heads
There are 8 possible outcomes when a coin is tossed 3 times. Here they are:1. Heads, Heads, Tails.2. Heads, Tails, Heads.3. Tails, Heads, Heads.4. Heads, Heads, Heads.5. Tails, Tails, Heads.6. Tails, Heads, Tails.7. Heads, Tails, Tails.8. Tails, Tails, Tails.There is only one outcome that is heads, heads, heads, so the probability of three heads coming up in three coin tosses is 1 in 8 or 0.125 for that probability.
Heads+Heads ; Heads+Tails ; Tails+Tails
If you mean what is the probability of getting a heads/tails, it is a 1 in 2 chance (50/50 chance). You are just as likely to get a heads as you are to get a tails.
Your question is slightly vague, so I will pose a more defined question: What is the probability of 3 coin tosses resulting in heads exactly twice? This is a pretty easy question to answer. The three possible (winning) outcomes are: 1. Heads, Heads, Tails. 2. Heads, Tails, Heads. 3. Tails, Heads, Heads. If we look at the possible combination of other (losing) outcomes, we can easily determine the probability: 4. Heads, Heads, Heads. 5. Tails, Tails, Heads. 6. Tails, Heads, Tails. 7. Heads, Tails, Tails. 8. Tails, Tails, Tails. This means that to throw heads twice in 3 flips, we have a 3 in 8 chance. This is because there are 3 winning possibilities out of a total of 8 winning and losing possibilities.
There are eight possible results when flipping three coins (eliminating the highly unlikely scenario of one or more coins landing on their edge): Dime - Heads / Nickel - Heads / Penny - Heads Dime - Heads / Nickel - Heads / Penny - Tails Dime - Heads / Nickel - Tails / Penny - Heads Dime - Heads / Nickel - Tails / Penny - Tails Dime - Tails / Nickel - Heads / Penny - Heads Dime - Tails / Nickel - Heads / Penny - Tails Dime - Tails / Nickel - Tails / Penny - Heads Dime - Tails / Nickel - Tails / Penny - Tails
The probability is 0%. The result will be heads or it will be tails but it cannot be heads and tails.
Two ways to think about it: 1: 25% both heads 50% one of each 25% both tails -or- 2: 25% heads/heads 25% heads/tails 25% tails/heads 25% tails/tails
Heads have a person on it. Tails have something else on it.
The outcomes are: heads, tails, tails or tails, heads, tails or tails, tails, heads. You can see that there are 3 possible outcomes with exactly 1 head.
tails
Because you are thinking permutations rather than combinations. There are four permutations of two coins, but there are only three combinations, because it does not matter which coin is heads and which coin is tails. As a result, the combination of heads and tails has a 0.5 probability, while two heads or two tails each have a 0.25 probability.