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There are (2a+16) students in a Coaching...

There are `(2a+16)` students in a Coaching Institute with three streams, i.e. Engineering, medical & Commerce. The ratio of students who take Energineering to Medical is `4:1.` Find total number of students in Coaching Institute.
A. Total students who take Engineering are 8 more than total students who take Commerce and probability of selecting one student who take Medical is `1/8.`
B. Total Commerce students in class are `25%` less than total Engineering students in the Coaching Institute.

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