Question

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 1

Explanation:

अर्जुन ऑफ दिस एंड फीचर्स एंड स्पेसिफिकेशंस ऑफ द नेशन इन द प्राइम मिनिस्टर ऑफ इंडिया टुडे