How long did a Jew live before they were killed in concentration camps?

a Jew in a concentration camp would live no longer than 3 months as they were worked to death with little food and would then be shot so that they could not escape and tell the rest of the world what was happening. they would then be burnt in huge ovens and other Jews would burn them.

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It varied. At the extermination camps most Jews were killed as soon as possible after arrival.

For those selected for work, 'no longer than 3 months' is not necessarily correct. Some even survived.