Random Variables · Linearity of Mathematical Expectation

Lesson 10

Nikolai Chukhin · Alexander S. Kulikov

Problem. Test your intuition! How many (approximately) rolls of a die on average are needed until all six numbers appear?

This problem can only be submitted at Cogniterra.

  1. 6

  2. 7

  3. 15

  4. 30

  5. 36