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When a fair coin is tossed 20 times in a row what is the probability that heads comes up 10 times in a row somewhere in the 20 tosses?
Wiki User
∙ 12y ago
The probability of 10 heads in a row is (0.5)10 = 0.000977 = 0.0977% .
It makes no difference what has come before or what comes after.
Wiki User
∙ 12y ago
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What is the probability that exactly two times head are being tossed?
The answer depends on how many times the coin is tossed. The probability is zero if the coin is tossed only once! Making some assumptions and rewording your question as "If I toss a fair coin twice, what is the probability it comes up heads both times" then the probability of it being heads on any given toss is 0.5, and the probability of it being heads on both tosses is 0.5 x 0.5 = 0.25. If you toss it three times and want to know what the probability of it being heads exactly twice is, then the calculation is more complicated, but it comes out to 0.375.
When a fair coin is tossed 10 times in a row what is the probability that heads comes up at least once?
Pr(H at least once in 10 tosses) = 1 - pr(No H in 10 tosses) = 1 - Pr(10 T in 10 tosses) = 1 - (1/2)10 = 1 - 1/1024 = 1023/1024
A coin is tossed twice if heads comes up either time you get 2 if heads does not come up you lose 4?
This is a good bet to take. Your expected payout is 0.5 each round of the 2 tosses. The possible outcomes from 2 tosses: HT, HH, TT, TH. The probability that heads comes up is 3 in 4 (.75). The probability that heads does not come up is 1 in 4 (.25). Your expected payout is: (2 * .75) + (-4 * .25) = 1.5 - 1 = 0.5
When a coin is tossed 7 times in a row what is the probability that heads comes up?
The chance is 3.5/7.
When a coin is tossed 7 times in a row what is the probability that heads comes up at least 4 times?
1/2
When a coin is tossed 10 times in a row what is the probability that heads comes up at least 7 times?
7/10
When a coin is tossed 9 times in a row what is the probability that heads comes up 9 times?
It is (1/2)9 = 1/512
If a coin is tossed 4 times and heads comes up all 4 times the probability of getting heads on the fifth try is?
0.5, 1/2, 50% The probability for heads versus tails does not change based on the amount of times the coin is tossed. It will always be a 50% chance.
A fair coin is tossed ten times in a row. What is the probability that heads comes up exactly five times?
it is a fair chance so 1/2 :P
You throw a die 20 times and it comes up a 5 on 17 out of 20 tosses. What is your best bet for the next roll?
Assuming a fair 6 sided die, there is a 1/6 probability for each number you could choose.
If a coin and a dice is tossed what is the probaility of getting a heads and six?
Heads comes up half the time, sis one time in six tosses so the combined odds of heads and six is 1/2 x 1/6 = 1/12, one time in 12.
What is the probability if something comes out 70 percent?
The probability is that it comes out 7 times out of 10 tries, or 70% of the times.
