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five letter words are formed each containing 2 consonants & 3 vowels out of the letters of the word equation.in how many of these the two consonants are always together?
Dear manisha
equation = 3 consonent + 5 vowel
two consonent can be selected =3C2 =3 ways
3 vowels can be selected =5C3 = 10 ways
now two consonent will remain together so total word = 3*10*4!*2!= 1440
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