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The second part of the question is not specific enough. Is it 2 on the roll of a die, a spin of a spinner, a card from a deck, a roulette wheel?

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Q: What is the probability of obtaining heads and a 2?
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What is the probability of obtaining heads and a two?

The answer depends on what the experiment is!


What is the probability of obtaining exactly seven heads in eight flips of a coin given that at least one is a head?

The probability of obtaining 7 heads in eight flips of a coin is:P(7H) = 8(1/2)8 = 0.03125 = 3.1%


What is the probability of obtaining three heads?

Probably 3/4


What is the probability of obtaining 3 heads in three flips of a fair coin?

1/2 * 1/2 * 1/2 = 1/8 = 12.5%


What is the probability of tossing a coin 6 times and obtaining at least 3 consecutive heads?

The probability is 5/16.


If 5 coins are flipped what is the probability of obtaining at least one heads?

The correct answer is 31/32 or 0.96875 because .50/2/2/2/2= 3.125%


What is the probability of obtaining exactly six heads in seven flips of a coin?

7*(1/2)7 = 7/128 = 5.47% approx.


What is the probability of obtaining exactly 5 heads in 6 flips of a fair coin?

It is approx 0.0938


What is the probability of obtaining exactly 4 heads in a coin?

About a 1 in 16 chance of getting a coin to land on heads 4 times in a row.


What is the probability of getting 2 heads when 2 coins are tossed?

The probability of tossing two heads in two coins is 0.25.


Two coins are tossed What is the probability of both coins are heads?

The probability that both coins are heads is the probability of one coin landing heads multiplied by the probability of the second coin landing heads: (.5) * (.5) = .25 or (1/2) * (1/2) = 1/4


Why is it called experimental probability?

It's difficult to think of a real event to which an exact probability can be assigned. We say that flipping a coin yields 'heads' with probability 1/2 but we do not know that definitely. The only way of assigning a probability in the sense of numbers of heads versus total numbers of flips is by experiment. (Be aware though that there are other interpretations of the word probability.) If I were to flip a coin 500 times and obtained 249 heads then the experimental probability of obtaining a head would be 249/500 or 0.498.