तीन संख्याओं का औसत 15 है यदि 2 संख्या 10 तथा 29 है तो तीसरी संख्या क्या होगी
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let the third is x =10+29+x/3= 39+x/3= 13+x=×=13
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utar tees hai . picture me detailed me Likha hua hai
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