Answers

2014-03-11T16:24:30+05:30
Let the no. of sums he got right be x
ten the no. of sums he got wrong are 48-x
according to the question 
2x=48-x
3x=48
x=16 ans
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2014-03-11T16:40:01+05:30
Total wrong answers = twice of right answers
Let wrong answers be W and right answers be R
W=2R
Total wrong answers+Total right answers = 48
W+R = 48
2R+R = 48 (Since W=2R)
3R = 48
Therefore, R=16

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