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Practice #38,342
Q
एक कक्षा के 17 विद्यार्थियों की औसत आयु 20 वर्ष है। यदि 38 वर्ष की आयु वाला एक नया विद्यार्थी कक्षा में शामिल होता है, तो इन 18 विद्यार्थियों की औसत आयु कितनी होगी?
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