Question

How many 4 letter words can be formed using the letters of the word 'INEFFICIENT' ?
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Answer 1

Answer:

There is only one set of three same letters i.e E E E. These 4 letter can be arranged in ways=4!/3! 1!

Answer 2

Answer:

I am telling you one question please answer this

find three rational number between

5 and 6

please explanation