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There are four types of candidates in our coaching preparing for the CAT. The number of student of engineering , science, commerce, and humanities id 40, 60, 50 and 30 respectively and the respective percentage of students who qualified the CAT `80%,75%,60%` and `50%` respectively the overall percentage of successful candidates in our institute is :

A

`67.77%`

B

`66.66%`

C

`68.5%`

D

none of these

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The correct Answer is:
A
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