Consider two lists of numbers called list1 and list2. A programmer wants to determine how many different values appear in both lists. For example, if list1 contains [10, 10, 20, 30, 40, 50, 60] and list2 contains [20, 20, 40, 60, 80], then there are three different values that appear in both lists (20, 40, and 60).
The programmer has the following procedures available.
Procedure Call Explanation
Combine (myList1, myList2) This procedure creates a new list containing the elements from myList1 followed by the entries from myList2. The resulting
list is returned. For example, if myList1 contains [2, 4, 6] and
myList2 contains [1, 5], the procedure will return the list
[2, 4, 6, 1, 5].
RemoveAllDups (myList) This procedure creates a new list containing the elements of myList with any duplicate values removed. The resulting list is returned. For
example, if myList contains [3, 2, 4, 2, 2, 5, 6, 4],
the procedure will return the list [3, 2, 4, 5, 6].
Which of the following can be used to assign the intended value to count ?
answer choices
bothList ← Combine (list1, list2)
uniqueList ← RemoveAllDups (bothList)
count ← LENGTH (bothList) - LENGTH (uniqueList)
newList1 ← RemoveAllDups (list1)
newList2 ← RemoveAllDups (list2)
bothList ← Combine (newList1, newList2)
count ← LENGTH (list1) + LENGTH (list2) - LENGTH (bothList)
newList1 ← RemoveAllDups (list1)
newList2 ← RemoveAllDups (list2)
bothList ← Combine (newList1, newList2)
count ← LENGTH (newList1) + LENGTH (newList2) - LENGTH (bothList)
newList1 ← RemoveAllDups (list1)
newList2 ← RemoveAllDups (list2)
bothList ← Combine (newList1, newList2)
uniqueList ← RemoveAllDups (bothList)
count ← LENGTH (bothList) - LENGTH (uniqueList)

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