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A card is drawn at random from a deck of cards.whats is the probability at drawing ace or jacK

Soluzione

A card is drawn at random from a deck of cards.whats is the probability at drawing ace or jacK

Soluzione

\frac{2}{13}

Fasi della soluzione

Find the probability of at drawing ace:

\frac{1}{13}

Find the probability of jacK:

\frac{1}{13}

Since the events are disjoint, Use the formula

P (X_{1} \lor X_{2} \lor \dots \lor X_{k}) = P (X_{1}) + P (X_{2}) + \dots + P (X_{k})

= \frac{1}{13} + \frac{1}{13}

\frac{1}{13} + \frac{1}{13} = \frac{2}{13}

= \frac{2}{13}

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