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What are the chances of a coin landing on heads 35 times in a row?
In 34 or fewer tosses, the answer is 0. In infinitely many tosses, the answer is 1. The answer depends on the number of tosses and, since you have chosen not to share that critical bit of information, i is not possible to give a more useful answer.
Sarah tosses 25 coins 3 out of every 5 are heads up and the rest are tails upHow many coins are tails up?
10 coins would be tails up.
If you toss a penny 1000 times how many times will it land on heads?
Theoretically, if you have a fair coin, the chances of landing on heads after 1000 tosses is 500, since there are only two outcomes, heads or tails, and each outcome is equally likely. Experimentally, however, the number of times the penny would turn up heads is any number from 1 to 1000, including 1 and 1000 (although these are very unlikely outcomes). The most likely outcome is a number very close to 500.
What are the chances you are going to toss 2 pennies 20 times how many times do you expect the 2 pennies will come up 2 heads?
Each time you toss two pennies, there are four ways they can land: H H H T T H T T One of the four ways is (Heads - Heads), so the probability of 2 heads is 1/4 or 25% . If the pennies are 'fair' (not loaded), and you toss them a large number of times, you should expect 2 heads roughly 1/4 of the time. Out of 20 tosses, that's 5 times. But don't bet on it.
How many heads can you have?
The law of large numbers infers you will have 50% heads.
