allery20 জন শিক্ষাৰ্থীৰ গড় নম্বৰ 60 আৰু 30 জন শিক্ষাৰ্থীৰ গড় নম্বৰ 70। সামগ্ৰিক গড় কিমান?
A65
B68
C66
D67
Answer & Solution
Correct answer: C. 66
মুঠ হ'ল 1200 আৰু 2100, গতিকে 3300-ক 50 জন শিক্ষাৰ্থীৰে হৰণ কৰিলে 66 পোৱা যায়।
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