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75% is not correct.
The odds of flipping 4 independent coins is the same as flipping one coin 4 times.
The number of outcomes of 4 flips is 2^4 or 16.
The number of ways to exactly get 3 Heads is 4 (THHH, HTHH, HHTH, HHHT) so your chance of flipping 3 heas is 4/16 or 25%.
If you include the occurance that produced 4 of 4 Heads, then you get 5/16 or 31.25%.
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What is the probability if you flip 3 coins and get three heads?
12.5%
What is the probability of flipping three coins and all of them land up on heads?
The probability of the first coin landing heads is half (or 1/2). Similarly, the probability of the second and third coins landing heads are also 1/2 in each case. Therefore, the probability of having three heads is: (1/2)(1/2)(1/2) = (1/8)
What is the probability of not tossing three heads with three fair coins?
The probability of something NOT happening is the complement of the probability of something happening. Since the probability that you DO have 3 heads is 1/8 (that is, 1/2 cubed), the complement is 1 - 1/8 = 7/8.
What is the probability of getting heads on three successive tosses of a coin?
0.53 = 0.125.
Three fair coins are tossed at the same time What is the probability that one of the coins will show heads and the other two will show tails?
2/9
