Math and Arithmetic

Statistics

Probability

Top Answer

The probability of Tails on the first toss is 1/2.

The probability of Tails on the second toss is 1/2.

The probability of Tails on the third toss is 1/2.

The probability of Tails on the fourth toss is 1/2.

The probability of Tails on the fifth toss is 1/2.

The probability of Tails on the sixth toss is 1/2.

The probability of Tails on the seventh toss is 1/2.

The probability of all of them is (0.5 x 0.5 x 0.5 x 0.5 x 0.5 x 0.5 x 0.5) = (0.5)7 = 0.0078125

= 0.78125 %

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0The probability of getting two tails in the first two is 1/4. And it does not matter how many more times the coins are tossed after the first two tosses.

The probability of two tails on two tosses of a coin is 0.52, or 0.25.

The probability is 1/4

The answer would be 7x7x7x7. 2401 to 1.

The chance is 50%-50% that it will be heads or tails; this does not change regardless of the number of previous tosses and their results.

The probability is 3/8 = 0.375

The probability of tossing a coin twice and getting tails both times is 1 in 4, or 25%. If you have already tossed a coin and had it land on tails, the probability that it will land on tails again the next time you toss it is 50%.

The probablility of getting 2 tails in 4 tosses of a fair coin is most likely 50%, 2/4=1/2, or .50.

The probability is 0.5The probability is 0.5The probability is 0.5The probability is 0.5

In three tosses, the probability is 3/8.

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.

The expected value is the number of tosses times the probability of tails, so: E(number of tails) = 52 * 1/2 = 52/2 = 26

The probability is 1/16.

It depends on what variable the probability ratio was for! The random variable could have been the number of heads minus the number of tails, for example.

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