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In an entrance examination, Ritu scored $56$ percent marks, Smita scored $92$ percent marks and Rina scored $634$ marks. The maximum marks of the examination is $875 .$ What is the average marks scored by all the three girls together ?
A
$1929$
B
$815$
C
$690$
D
$643$
Solution
Ritu's marks $=875 \times \frac{56}{100}=490$
Smita's Marks $=875 \times \frac{92}{100}=805$
Rina's marks $=634$
Total marks $=490+805+634=1929$
Average $=\frac{1929}{3}=643$
Standard 13
Quantitative Aptitude
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