What is the approximate percentage marks obtained by D in all the subjects together?

45.5%

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60.5%

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56.5%

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50.6%

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Solution

The correct option is C
56.5%

$\begin{matrix} S u b j e c t s \to S t u d e n t s ↓ & S i g n a l a n d S y s t e m s & E l e c t r i c M a c h i n e s & P o w e r E l e c t r o n i c s & C o n t r o l S y s t e m & A n a l o g E l e c t r o n i c & N e t w o r k A n a l y s i s & T o t a l M a r k s A & 24 & 30 & 18 & 60 & 75 & 48 & 255 B & 21 & 60 & 60 & 45 & 90 & 52 & 328 C & 17 & 72 & 39 & 58 & 105 & 60 & 351 D & 15 & 66 & 45 & 80 & 51 & 68 & 325 E & 20 & 78 & 60 & 64 & 60 & 72 & 354 F & 19 & 84 & 45 & 78 & 66 & 64 & 356 T o t a l m a r k s & 116 & 390 & 267 & 385 & 447 & 364 \end{matrix}$

Percentage marks = $\frac{325}{575}$ $\times$ 100 = 56.52%

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