allery20 વિદ્યાર્થીઓના સરેરાશ ગુણ 60 છે અને 30 વિદ્યાર્થીઓના સરેરાશ ગુણ 70 છે. એકંદર સરેરાશ કેટલી થાય?
A65
B68
C66
D67
Answer & Solution
Correct answer: C. 66
કુલ ગુણ અનુક્રમે 1200 અને 2100 છે, તેથી 3300 ને 50 વિદ્યાર્થીઓ વડે ભાગતાં 66 મળે છે.
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