RRB Paramedical Staff Nurse Model Paper 1

Question : 55 of 100

Marks: +1, -0

In how many different ways can the letters of the word ‘HAPPY’ be arranged?

Solution:

HAPPY
There are 5 letters.
And number of words formed

={5 !}/{2 !}

=\;{5 × 4 × 3 × 2 × 1}/{2 × 1}=\;{120}/{2}=60

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