150k views
19 votes
There are 40 pieces of building blocks in a bag: 10 each of blue, green, red, and yellow. Two pieces are chosen at random. Identify the probability that both of the pieces chosen are green.

1 Answer

3 votes


\displaystyle |\Omega|=\binom{40}{2}=(40!)/(2!38!)=(39\cdot40)/(2)=780\\|A|=\binom{10}{2}=(10!)/(2!8!)=(9\cdot10)/(2)=45\\\\P(A)=(45)/(780)=(3)/(52)\approx5,8\%

User Vamsivanka
by
7.2k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories