Three cards are drawn in succession, without replacement, from an
ordinary deck of 52 cards, Find the probability that the first card is a
red ace, the second card is a 10 or Jack and the third card is greater
than 3 but less than 7.
Solution
There are 2 red Ace card in a deck, therefore
๐‘ท(๐‘ญ๐’Š๐’“๐’”๐’• ๐’„๐’‚๐’“๐’… ๐’Š๐’” ๐’‚ ๐’“๐’†๐’… ๐‘จ๐’„๐’†) = ๐‘ท(๐‘จ) =
๐Ÿ
๐Ÿ“๐Ÿ
There are 4 cards of 10 and 4 cards of Jack in a deck, second card
will be drawn from the remaining 51 cards. Therefore
๐‘ท(๐‘บ๐’†๐’„๐’๐’๐’… ๐’„๐’‚๐’“๐’… ๐’Š๐’” ๐’‚ ๐Ÿ๐ŸŽ ๐’๐’“ ๐‘ฑ๐’‚๐’„๐’Œ) = ๐‘ท(๐‘ฉ) =
๐Ÿ–
๐Ÿ“๐Ÿ
There exists 12 card which are greaterthan 3 but less than 7, therefore
๐‘ท(๐‘ป๐’‰๐’Š๐’“๐’… ๐’„๐’‚๐’“๐’… ๐’Š๐’” ๐ ๐ซ๐ž๐š๐ญ๐ž๐ซ ๐ญ๐ก๐š๐ง ๐Ÿ‘ ๐›๐ฎ๐ญ ๐ฅ๐ž๐ฌ๐ฌ ๐ญ๐ก๐š๐ง ๐Ÿ•) = ๐‘ท(๐‘ช) =
๐Ÿ๐Ÿ
๐Ÿ“๐ŸŽ
Probability that three cards are drawn in succession, without replacement is
๐‘ท(๐‘จ โˆฉ ๐‘ฉ โˆฉ ๐‘ช) = ๐‘ท(๐‘จ) ร— ๐‘ท(๐‘ฉ
๐‘จ
โ„ ) ร— ๐‘ท(๐‘ช
๐‘จ โˆฉ ๐‘ฉ
โ„ )
๐‘ท(๐‘จ โˆฉ ๐‘ฉ โˆฉ ๐‘ช) =
๐Ÿ
๐Ÿ“๐Ÿ
ร—
๐Ÿ–
๐Ÿ“๐Ÿ
ร—
๐Ÿ๐Ÿ
๐Ÿ“๐ŸŽ
= ๐ŸŽ. ๐ŸŽ๐ŸŽ๐Ÿ๐Ÿ’๐Ÿ“

Three cards are drawn in succession.docx

  • 1.
    Three cards aredrawn in succession, without replacement, from an ordinary deck of 52 cards, Find the probability that the first card is a red ace, the second card is a 10 or Jack and the third card is greater than 3 but less than 7. Solution There are 2 red Ace card in a deck, therefore ๐‘ท(๐‘ญ๐’Š๐’“๐’”๐’• ๐’„๐’‚๐’“๐’… ๐’Š๐’” ๐’‚ ๐’“๐’†๐’… ๐‘จ๐’„๐’†) = ๐‘ท(๐‘จ) = ๐Ÿ ๐Ÿ“๐Ÿ There are 4 cards of 10 and 4 cards of Jack in a deck, second card will be drawn from the remaining 51 cards. Therefore ๐‘ท(๐‘บ๐’†๐’„๐’๐’๐’… ๐’„๐’‚๐’“๐’… ๐’Š๐’” ๐’‚ ๐Ÿ๐ŸŽ ๐’๐’“ ๐‘ฑ๐’‚๐’„๐’Œ) = ๐‘ท(๐‘ฉ) = ๐Ÿ– ๐Ÿ“๐Ÿ There exists 12 card which are greaterthan 3 but less than 7, therefore ๐‘ท(๐‘ป๐’‰๐’Š๐’“๐’… ๐’„๐’‚๐’“๐’… ๐’Š๐’” ๐ ๐ซ๐ž๐š๐ญ๐ž๐ซ ๐ญ๐ก๐š๐ง ๐Ÿ‘ ๐›๐ฎ๐ญ ๐ฅ๐ž๐ฌ๐ฌ ๐ญ๐ก๐š๐ง ๐Ÿ•) = ๐‘ท(๐‘ช) = ๐Ÿ๐Ÿ ๐Ÿ“๐ŸŽ Probability that three cards are drawn in succession, without replacement is ๐‘ท(๐‘จ โˆฉ ๐‘ฉ โˆฉ ๐‘ช) = ๐‘ท(๐‘จ) ร— ๐‘ท(๐‘ฉ ๐‘จ โ„ ) ร— ๐‘ท(๐‘ช ๐‘จ โˆฉ ๐‘ฉ โ„ ) ๐‘ท(๐‘จ โˆฉ ๐‘ฉ โˆฉ ๐‘ช) = ๐Ÿ ๐Ÿ“๐Ÿ ร— ๐Ÿ– ๐Ÿ“๐Ÿ ร— ๐Ÿ๐Ÿ ๐Ÿ“๐ŸŽ = ๐ŸŽ. ๐ŸŽ๐ŸŽ๐Ÿ๐Ÿ’๐Ÿ“