# Questions tagged [probability]

For basic questions about probability and the questions associated with the calculation of probability, expected value, variance, standard deviation, or similar statistical quantities. For questions about the theoretical footing of probability (especially using [tag:measure-theory]), ask under [tag:probability-theory] instead. For questions about specific probability distributions, use [tag:probability-distributions] instead.

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### Find the probability that more heads occur than tails. [closed]

A biased coin with the probability of getting head = 1/3, is tossed 3 times. Find the probability that more heads occur than tails. Find the probability that all the outcomes are the same. Find the ...
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### Prove Jensen's inequality?

I was interested to see a proof for Jensen's inequality for the following variant: Let $X$ be a discrete random variable with finite expected value and let $h:\mathbb{R} \to \mathbb{R}$ be a convex ...