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class मे लडको की ओसत उम् लडकीयो के संख्या के दोगुनी है यदी 30students के class मे लडको तथा लडकीयो का अनुपात 4:1 है class मे लडको की कुल उम् 288 year hogi ... but kese plz give me ans.

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