A batch of 50 different automatic typewriters contains

A batch of 50 different automatic typewriters contains exactly 10 defective machines. What is the probability of finding:

(a) At least one defective machine in a random group of 5 machines?

(b) At least two defective machines in a random group of 10 machines?

(d) The last defective machine to be the k-th machine taken apart?

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A batch of 50 different automatic typewriters contains : a batch of 50 different automatic typewriters contains exactly 10 defective machines. what is the probability of

A pendulum is made with a 4 kg mass suspended at the end of : a pendulum is made with a 4 kg mass suspended at the end of a 75 cm thin rod. the pendulum is started at an angle 20

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