Problem #PRU-65356

Problemas Probabilidad y estadísticas Teoría de la probabilidad Probabilidad condicional Distribución discreta Álgebra Valores medios

Problem

There is a deck of playing cards on the table (for example, in a row). On top of each card we put a card from another deck. Some cards may have coincided. Find:

a) the mathematical expectation of the number of cards that coincide;

b) the variance of the number of cards that coincide.