Q.

Number of ways in which the letters of the word “ TOMATO” can be arranged if two alike vowels are separated, is not equal to:

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a

Number of 3 digit numbers with at least one 3 and at least one 2.

b

Number of ways in which 2 alike apples and 4 alike oranges can be distributed in three children if each child one or more fruits.

c

Number of ways in which letters of the word “RAITHATHA” can be arranged if no two alike letters are separated.

d

Number of ways in which Ram and Rama can exchange their maps if Ram has 3 and Rama has 7 maps, all maps being different, maintaining their original number of maps at the end. 

answer is B, C, D.

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Detailed Solution

  Answer is |T|M|A|T|  Number of ways  =5C2×4!2!=10×12=120
(a)  RAITHATHA
  A=3, H=2, T=2, R=1, I=1
 Question Image
 =3!2!+3!2!+(7C1×3!)+(2×2)
 =3+3+42+4=52.
(c) M1,M2,....,M7|N1,N2,N3
Total ways =  3(7C1)+3(7C2)+1(7C3)
 
=21+63+35=119

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