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    At the birthday party of Anil, a baby boy, 40 persons choose to kiss him and 25 choose to shake hands with him. 10 persons choose to both kiss him and
    Question

    At the birthday party of Anil, a baby boy, 40 persons choose to kiss him and 25 choose to shake hands with him. 10 persons choose to both kiss him and shake hand with him. How many persons turned out at the party ?

     

    A.

     35


    B.

      75


    C.

      55


    D.

     25

    Correct option is C

    Using the principle of inclusion-exclusion:

    Total persons = 40 + 25 − 10 = 55

    (10 people are counted twice because they both kissed and shook hands).

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