Q. 245.0( 2 Votes )

Of the students i

Answer :

Let P(E1) be the probability of students residing in hostel.

Let P(E2) be the probability of day scholar students.

30% of hostel students get an A grade

P (E│E1 ) = 30% = 0.3

20% of day scholar students get an A grade

By Baye’s Theorem

the probability that the ‘A’ grade student chosen is a hostler is;

= 0.692

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