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In "Data Science Interview Preparation(#DAY 02).pdf", on page no. 15, you have written like, "each feature are assumed to be distributed according to a Gaussian Distribution but In GNB, we will assume likelihoods to be Gaussian distributed right, not features(not P(x_i), it is P(x_i/y)). and then we will use maximum likelihood estimation to estimate all mean and std of each feature per class, that is why we will get the "sigma_" shape of (n_classes, n_features) in SKlearn implementation as well.

Hi Sir/Madam,
In the '30 Days of interview prepartions' all the folders except the '29th day folder' have the day number with the folder's title. It would be nice if you can rename the folder "Data Science Interview Preparation.pdf" to 'Data Science Interview Preparation(#Day29).pdf .
Regards,
Shyam

while opening files I'm facing an issue "unable to render code block". how to solve it?

It should be
Recall = True Positives / (True positives + False Negatives)