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Question

Number of palindrome words formed by taking 2 or more letters from the word 'RESONANCE' (palindrome words are those which read same forward and backward)

A
87
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B
57
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C
84
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D
28
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Solution

The correct option is D 28
palindromes
a word, phrase, or sequence that reads the same backwards as forwards
so we have 2 E's and 2N's only so we can make only 5 letter word from the given
2 letter 2C1=2
3 letter 2C1×6=12(as we can put 6 letters in between the two)
4 letter only 2 word i.e.ENNE,NEEN
5 letter 2C1×6=12(as first letter will be E or N and second will be respectively)
Answer=28

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