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Lakshmi,Sita and Radha are friends studying in the same class.in a class test in geography Lakshmi got 16 out of 25, Sita got 20 out of 25. Their average

score was 19 . How much did Radha sore in the geography test????


Let Radha got X
So, (16+25+X)/3=19
So X=16
0 0 0
Let us assume that radha got x marks
marks of lakshmi=16
marks of sita=20
accoeding to problem,
0 0 0
we know that average = sum / no. of quantities
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