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CBSE Class 7 Answered

Abhinav bought five radio sets at rate of Rs 230.He sold two radio sets at a loss of 25% .At what gain percent should he sell the remaining books to gain 25%,on the overall investment?
Asked by suneelk352 | 21 Mar, 2019, 10:19: PM
answered-by-expert Expert Answer
A b h i n a v space b o u g h t space 5 space r a d i o space s e t s space a t space R s space 230
rightwards double arrow C. P. space o f space o n e space r a d i o space equals space 46 space R s
rightwards double arrow C. P. space o f space 2 space r a d i o space s e t s space equals space 92 space R s
A b h i n a v space s e l l s space 2 space r a d i o space s e t s space a t space a space l o s s space o f space 25 percent sign
rightwards double arrow S. P. space o f space 2 space r a d i o space s e t s space equals space C. P. space minus space 25 percent sign space o f space 92 space equals space 92 minus 23 equals 69 space R s space..... space left parenthesis i right parenthesis
G a i n space percent sign space o n space o v e r a l l space i n v e s t m e n t space equals space 25 percent sign
N o w comma space 25 percent sign space o f space 230 space equals space 57.5 space R s
rightwards double arrow S. P. space o f space a l l space 5 space r a d i o space s e t s space equals space 230 plus 57.5 equals 287.5 space R s.
S. P. space o f space r e m a i n i n g space 3 space r a d i o space s e t s space equals space 287.5 minus 69 equals 218.5 space R s space... space F r o m space left parenthesis i right parenthesis
A n d space C. P. space o f space 3 space s e t s space equals space 138 space R s.
rightwards double arrow G a i n space a m o u n t space o n space r e m a i n i n g space 3 space s e t s space equals space 218.5 minus 138 equals 80.5 space R s.
rightwards double arrow G a i n space percent sign space o n space r e m a i n i n g space s e t s space equals space fraction numerator 80.5 over denominator 138 end fraction cross times 100 equals 58.33 percent sign
H e n c e comma space a b h i n a v space s h o u l d space s e l l space t h e space r e m a i n i n g space s e t s space a t space t h e space g a i n space percent sign space o f space 58.33 percent sign space t o space g a i n space 25 space percent sign space o n space o v e r a l l space i n v e s t m e n t.
Answered by Renu Varma | 22 Mar, 2019, 10:20: AM
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