The answer to the first question is 0.5. The answer to the second is not possible to work out.
It is 1/2.
The probability of flipping three tails with three coins is (1 in 2)3 or 1 in 8 or 0.125.
If they are fair coins, the probability is 0.25
When flipping two coins, each coin has two possible outcomes: heads (H) or tails (T). The total number of outcomes when flipping two coins is 2 × 2 = 4, which includes HH, HT, TH, and TT. Out of these four outcomes, only one results in both coins landing on tails (TT). Therefore, the probability of both coins landing on tails is 1 out of 4, or 25%.
For a normal coin, it is 0.5.
The probabilty of you flipping 3 coins and getting all heads or tails is 0.125 or 1/8.
The probability of getting all tails is 1/25 = 1/32
The probability of a fair coin landing on tails is 0.5. The probability of 4 tails is .5*5*.5*.5 = 0.0625.
http://wiki.answers.com/Q/If_you_Flip_four_coins_at_once_what_is_probability_of_2_head_and_3_tail" The probability of flipping four coins and getting 2 heads and 3 tails is ZERO 2 heads and 3 tails requires flipping FIVE coins.
the probabiluty of two coins landing on tails is 1/2 x 1/2 = 1/4, or one chance in four
It is 1/2.
The probability of 2 coins both landing on heads or both landing on tails is 1/2 because there are 4 possible outcomes. Head, head. Head, tails. Tails, tails. Tails, heads. Tails, heads is different from heads, tails for reasons I am unsure of.