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a code is 4 random letters and 3 random digits. what is the probability of the 4...

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Statistics

acode is 4 random letters and 3 random digits. what is theprobability of the 4 letters all being different while the 3.numbers at the end are in ascending order?

b) in a group of 10 codes.... what is the probability that atleast two have all different letters and numbers in ascendingorder

c) in 1000 codes what is the wxpected value and standarddeviation for the codes with all different letters and ascendingdigits

Answer & Explanation Solved by verified expert
4.4 Ratings (757 Votes)
The code is formed using 4 random letters and 3 randomdigitsWe knowThe probability of an event the number of favorable cases tothat eventTotal number of outcomesWe have to find the probability of the 4 letters all beingdifferent while the 3 numbers at the end are in ascendingorderHere total number of outcomes number of arrangements of 4letters from 26 alphabets where each alphabet can repeat upto 4times x number of arrengements of 3 digits from 10 digits whereeach digit can    See Answer
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