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@ 4.3.15 Question Help? :5 In an experiment, college students were given either four quarters or a $1 bill and they could either keep the money or spend it on gum. The results are summan'zed in the table. Complete parts (a) through (c) below. Purchased lGum Kept the Money la Students Given Four Quarters 29 16 Students Given a 51 Bill 19 25 a. Find the probability of randomly selecting a student who spent the money, given that the student was given four quarters. The probability is 0.644 . (Round to three decimal places as needed.) b. Find the probability of randomly selecting a student who spent the money, given that the student was given a $1 bill. The probability is (Round to three decimal places as needed.) 4.4.33 Assigned Media 7 Question Help 7 {I In the game of blackjack played with one deck, a player is initially dealt 2 different cards from the 52 different cards in the deck. A winning "blackjack" hand is won by getting 1 of the Il- aces and 1 of 15 other cards worth 1|] points. The two cards can be in any order. Find the probability of being dealt a blackjack hand. What approximate percentage of hands are winning blackjack hands? 32 The probability Is E . (Type an integer or a simplied fraction.) The percentage of hands that are winning blackjack hands is 'KL (Round to two decimal places as needed.) 4.2.25 Assigned Media Question Help The principle of redundancy is used when system reliability is improved through redundant or backup components. Assume that a student's alarm clock has a 14.9% daily failure rate. Complete parts (a) through (d) below. a. What is the probability that the student's alarm clock will not work on the morning of an important final exam? 0.149 (Round to three decimal places as needed.) b. If the student has two such alarm clocks, what is the probability that they both fail on the morning of an important final exam? (Round to five decimal places as needed.)