SOLUTION: In a class consisting of 12 men and 11 women, all who submitted homework papers, two different homework papers were selected at random. Find the probability that both papers belong

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Question 1171414: In a class consisting of 12 men and 11 women, all who submitted homework papers, two different homework papers were selected at random. Find the probability that both papers belonged to women. Express your answer as a decimal rounded to three places if necessary.
Answer by ikleyn(52803) About Me  (Show Source):
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In a class consisting of 12 men and 11 women, all who submitted homework papers, two different homework papers
were selected at random. Find the probability that both papers belonged to women.
Express your answer as a decimal rounded to three places if necessary.
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Solve it in two steps.


Step 1:  calculate the total number of students  12 + 11 = 23.


Step 2:  calculate the probability under the question


         P = %28%2811%2F23%29%2A%2810%2F22%29%29 = 0.217  (rounded as requested).

Solved.

The formula is SELF-EXPLANATORY.