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Suppose you toss a fair coin 75 times how many times would you expect to get heads?
Wiki User
∙ 11y ago
A fair coin means that the probability of a head = probability of a tail = 1/2
So you would expect half the tosses to be heads, ie 1/2 x 75 = 371/2 heads.
...oooOOOooo...
Having 1/2 a head doesn't seem possible, but when the question asks about expectation, it is saying: if you repeated the experiment lots of times, how often, on average, would the required result appear.
So the expectation of heads when a fair coin is tossed 75 times is asking: if a fair coin was repeatedly tossed 75 times, what would be the (mean) average number of heads achieved?
As more and more trials are done and the (mean) average of the number of heads got is taken, it will get closer and closer to 371/2
37 or 38 times. (Obviously, you can't have half of a time.) You will either get one or the other, and a fair coin means that either is just as likely. So, it should split evenly down the middle.
Wiki User
∙ 11y ago
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If you flip a coin 150 times about how many times would you expect to get heads?
75
if you flipped a coin 60 times how many times would you expect the coin to land on heads?
30 maybe but i say 35 or 31
A coin is tossed 100 times how many times would you expect to get heads?
The probability of a heads is 1/2. The expected value of independent events is the number of runs times the probability of the desired result. So: 100*(1/2) = 50 heads
You roll a 6 faced die 90 times about how many times would you expect to get a 5?
You can expect to get a 5 about 15 times out of 90.
How Many Times Would Pip Expect To Roll A Number Greater Than 2 A Fair Dice 150 Times?
He should expect it 100 times.
If you flip a coin 150 times about how many times would you expect to get heads?
75
If you flip a coin 20 times how many times would you expect it to land on heads?
A fair coin would be expected to land on heads 10 times on average.
Suppose the arrow is spun 50 times about how many times would you expect the spinner to lamd on an odd number?
You can expect the spinner to land an odd number 25 times out of 50.
If you flipped a coin 150 times about how many times would you expect it to land on heads?
A fair coin would be expected to land on heads 75 times.
Suppose you roll a regular 6 sided die 90 times About how many times would you expect to roll a 3?
90
How many times would you expect the coin to land on heads if you flipped the coin 700 times?
Roughly half of the time, so about 350 times.
if you flipped a coin 60 times how many times would you expect the coin to land on heads?
30 maybe but i say 35 or 31
If you toss three coins 10000 times how many times would you expect that exactly 2 heads appear?
The expected number is 3750.
A coin is tossed 100 times how many times would you expect to get heads?
The probability of a heads is 1/2. The expected value of independent events is the number of runs times the probability of the desired result. So: 100*(1/2) = 50 heads
suppose the arrow is spun 50 times. about how many times would you expect the spinner to land on an odd number the spinner is divided by 5?
5
3 coins how many times out of 100 would expect 3 heads or 3 tails?
25. In one throw the odds are 2/8. That is, th ere are 8 possible outcomes, two of which are considered "winning" combinations (HHH and TTT). In 100 throws, you would expect each of the 8 outcomes to occur 12 or 13 times (the average of the number of times each of the 8 outcomes occurs will always be exactly 12.5, whether the distribution is even or whether you got all heads all 100 throws and all the other combinations were zero). You would expect the number of times you get all heads or all tails - two of those combinations - to be 25.
Two coins are tossed 50 times how many times do you expect to get two heads?
This is a binomial probability distribution The probability of exactly 2 heads in 50 coin tosses of a fair coin is 1.08801856E-12. If you want to solve this for how many times 50 coin tosses it would take to equal 1 time for it to occur, take the reciprocal, which yields you would have to make 9.191019648E11 tosses of 50 times to get exactly 2 heads (this number is 919,101,964,800 or 919 billion times). If you assume 5 min for 50 tosses and 24 hr/day tossing the coin, it would take 8,743,360 years. That is the statistical analysis. As an engineer, looking at the above analysis, I would say it is almost impossible flipping the coin 50 times to get exactly 2 heads or I would not expect 2 heads on 50 coin tosses. So, to answer your question specifically, I would say none.
