Question: If we use 5-fold cross-validation for a dataset with 100 instances, what are the sizes of training data and test data in each of the

If we use 5-fold cross-validation for a dataset with 100 instances, what are the sizes of training data and test data in each of the 5 folds? If we use leave-one-out cross-validation for this dataset, how many folds are there?

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