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Of the students in a college, it is know...

Of the students in a college, it is known that `60 %`reside in hostel and `40 %` are day scholars (not residing in hostel). Previous year results report that `30 %` of all students who reside in hostel atțain A grade and `20 %` of day scholars attain A grade in their annual examination. At the end of the year, one stüdent is chosen at random from the college and he has an `A` grade, what is the probability that the student is a hostlier?

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A N EXCEL PUBLICATION-PROBABILITY-QUESTION BANK
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