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Mars2501 [29]
4 years ago
6

How many strings are there of four lowercase letters that have the letter x in them?

Mathematics
1 answer:
borishaifa [10]4 years ago
6 0
We can subtract from the number of strings of length 4 of lower case letters the number of string of length 4 of lower case letters other than x. Thus the answer is 264 − 254 = 66,<span>351</span>
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