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Question -

Five cards are drawn from a pack of 52 cards. What is the chance that these 5 will contain:
(i) just one ace
(ii) at least one ace?



Answer -

Given: Five cards aredrawn from a pack of 52 cards.

By using the formula,

P (E) = favourableoutcomes / total possible outcomes

Five cards are drawnat random,

Total possibleoutcomes are 52C5

n (S) = 2598960

(i) Let E be theevent that exactly only one ace is present

n (E) = 4C148C=778320

P (E) = n (E) / n (S)

= 778320 / 2598960

= 3243/10829

(ii) Let E be theevent that at least one ace is present

E = {1 or 2 or 3 or 4ace(s)}

n (E) = 4C148C4+4C248C3+4C348C2+4C448C=886656

P (E) = n (E) / n (S)

= 886656 / 2598960

= 18472/54145

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