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It is known that 65 % of Facebook users are playing the free games (at least one) advertised by Facebook. A) In a random sample

It is known that 65 % of Facebook users are playing the free games (at least one) advertised by Facebook.

A) In a random sample of 340 Facebook users, what's the probability that less than 210 of them are playing the free games?

B) In a random sample of 680 Facebook users, what's the probability that less than 420 of them are playing the free games?

Please help me!!

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