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Statistics help. You have 1000 coins. The probability of a coin being fake is 1%?
You have 1000 coins. The probability of a coin being fake is 1% so you can expect there to be 10 fake coins (the number could be bigger or smaller, disregard that).
You decide to divide 1000 coins into 50 batches of 20 coins each. What percentage of the batches will contain at least 1 fake coin?
I am stumped by the part 'percentage of 50 batches' . Should we treat this is a binomial problem , or not.
For one batch of 20 coins, the probability the batch contains at least one fake 1 - ( 1- 1/100)^20 or is 0.18289. But how does that help us with the 50 batches.
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