What is the probability that exactly 2 are defective

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Reference no: EM131927433

1.) An unbiased coin is tossed 20 times. Find the probability that the coin lands:

  • heads exactly 11 times. 
  • tails at most 17 times.
  • heads at most 3 times.

2.) A computer stores receives a box of a certain video game. The box contains 40 games of which 6 are defective. A quality-control inspector randomly chooses 7 games from the box. 

  • What is the probability that exactly 2 are defective?
  • That exactly 0 are defective?
  • That at most 4 are defective?

Reference no: EM131927433

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