Find the number of different arrangements of the letters in the word hospital if you could use three or four letters at a time.
2 answers:
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Answer:
<h2>The option B and D are the equations.</h2>Step-by-step explanation:
Let, the total number of students are x.
The number of students having the ticket is .
It is given that the number is 20.
Hence, .
Option B is the equation.
Option D is also the same.
The difference is just, the variable is wriiten in the other side.