Statistics Solutions

[See Solution] A box contains 25 tickets with the number 40 on them and 25 tickets with the number 100 on them. Four hundred draws are made at random with replacement

Question: A box contains 25 tickets with the number 40 on them and 25 tickets with the number 100 on them. Four hundred draws are made at random with replacement from this box.

  1. Find the chance (approximately) that the average of the draws will be in the range 55 to 85.
  2. Find the chance (approximately) that the average of the draws will be in the range 69.25 to 70.75.

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