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In an exam , 3.5 points are awarded f...

In an exam , 3.5 points are awarded for evey correct answer and 0.45 points are deducted for every wrong answer. If out of N question , a boy answers at least 4 questions wrong and at most 8 questions wrong ,which of the following correctly gives the correct range of score ,S, he can get in the exam ?

A

`3.5N - 31.6 le S le 3.5N - 15.8`

B

`3.5N - 31.6 le S le 3.5N`

C

`15.8 le S le 3.5N - 3.16`

D

`3.5N le S le 31.6`

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