document.write( "Question 252672: A class of 10 students has an average score of 95. Another class of 15 students has an average score of 80. What is the weighted average?\r
\n" ); document.write( "\n" ); document.write( "A) 83 B) 86 C) 87.5 D) 88 E) 90
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Algebra.Com's Answer #184688 by palanisamy(496)\"\" \"About 
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A class of 10 students has an average score of 95.
\n" ); document.write( "Total marks = 10*95 = 950
\n" ); document.write( "Another class of 15 students has an average score of 80.
\n" ); document.write( "Total marks = 15*80 = 1200
\n" ); document.write( "Total number of students in both classes = 10+15 = 25
\n" ); document.write( "Total marks obtained by the students in both classes = 950+1200 = 2150
\n" ); document.write( "Weighted average of all the students = 2150/25
\n" ); document.write( " = 86\r
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