20
2 heads and 2 tails
No there is a fifty fifty chance of getting heads or tails
no
None, since that would imply that in 18 cases the coin did not show heads or tails!
When tossing 4 coins, there are a total of (2^4 = 16) possible outcomes. The combinations for getting exactly 2 heads (and consequently 2 tails) can be calculated using the binomial coefficient, which gives us (\binom{4}{2} = 6) ways. Therefore, the probability of getting exactly 2 heads is ( \frac{6}{16} = \frac{3}{8} ). Since getting 2 heads and 2 tails are the same event, the total probability of getting either 2 heads or 2 tails is also (\frac{3}{8}).
2 heads and 2 tails
No there is a fifty fifty chance of getting heads or tails
The probabilty of you flipping 3 coins and getting all heads or tails is 0.125 or 1/8.
1heads heads heads 2heads heads tails 3heads tails heads 4heads tails tails 5tails tails tails 6tails tails heads 7tails heads tails 8tails heads heads
no
The probability of getting all heads is 1/24 = 1/16 The probability of getting all tails is also 1/24 = 1/16 The probability of all heads or all tails is the sum of the two = 1/8
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.
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.
Heads+Heads ; Heads+Tails ; Tails+Tails
None, since that would imply that in 18 cases the coin did not show heads or 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.
the only combination which does not produce heads at least once it tails twice. the odds of getting tails twice is 0.5*0.5=0.25 so the odds for getting heads at least once is 1-0.25=0.75 or 75% or 3/4.