Suppose two 6-sided dice are rolled. What are the probabilities of the following events? At least one die lands on an odd number (call this event A). At least one die lands on a number less than or equal to 3 (call this event B). A or A and

Soluzione

S u pp ose tw o 6 - s i d e d d i ce a re ro ll e d . Wha t a re t h e p ro babi l i t i es o f t h e f o ll o w in g e v e n t s ? A t l e a s t o n e d i e l an d s o n an o dd n u mb er (c a ll t hi s e v e n t A) . A t l e a s t o n e d i e l an d s o n a n u mb er l ess t han or e q u a l t o 3 (c a ll t hi s e v e n t B) . A or A an d

The number : - 3

Fasi della soluzione

Represent the number with

x

A.T.Q.:

- 1 \cdot x = 3

Risolvi per

x, - 1 \cdot x = 3 : x = - 3

The number : - 3