Hi Ashok,
I would need more information to assist you better.
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From where did you buy this Office suite (From your organization, school etc.)?
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What do you mean by ‘I have source of 64 bit’?
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Are you referring to a DVD?
In case it is a DVD, then explore its contents and check if it has got a 32-bit folder.
If yes, then you may install the Office from it.
Reply with the results to assist you better.
Thank you.