SOLUTION: A class in advanced physics is composed of 10 juniors, 30 seniors, and 10 graduate students. The final grades show that 3 of the juniors, 10 of the seniors, and 5 of the graduate s

Question 1159395: A class in advanced physics is composed of 10 juniors, 30 seniors, and 10 graduate students. The final grades show that 3 of the juniors, 10 of the seniors, and 5 of the graduate students received an A for the course. If a student is chosen at random from this class and is found to have earned an A , what is the probability that he or she is a senior?
Answer by ikleyn(52756) (Show Source): You can put this solution on YOUR website!
.


ANSWER.  The probability under the problem's question is  P =  =  =  = 0.555 = 55.5% (approximately).

RELATED QUESTIONS
A class in advanced physics is composed of 10 juniors, 30 seniors, and 10 graduate... (answered by ikleyn)

This question is from Book " Introduction to Statistics" By Ronald E. Walpole. 3rd... (answered by oscargut)

The student body government is composed of 4 sophomores 5 juniors and 6 seniors. What is... (answered by ewatrrr,Shydudee98)

The final grades of students in Foreign Language are normally distributed. records show... (answered by CPhill)

Mrs. DiNardo's physics class has 115 students, classified by academic year and gender, as (answered by greenestamps,stanbon)

In a certain college, 40% of the senior class students is taking Physics, 30% is taking... (answered by josmiceli)

7. In a class of advanced statistics, there are 10 first- year, 30 second year and 10... (answered by ikleyn)

In a class of 100 students, it is known that 45 study mathematics, 26 study chemistry and (answered by richwmiller)

A class consists of 1/4 freshmen,1/5 sophomores, and 1/10 juniors; the rest are seniors. (answered by mananth)