There are 1150 students and all are enrolled in both Bio and Chem.Only 50 got A+ in Chem.375 got A+ in Biology.45 got A+ in both Bio and Chem.We select a student at random from the 1150 students.At in chemAt in Bid453301_ 330= 0.287e = 770 (got no At )11502 _ 5 – 0.0043511503 – 7 2 PAX in both = 1 – 45 = 0.960911504- 380 = 0.33011505 _7 70= 066961150

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