Homework Help Question & Answers

Three cards are selected at random from a group of 7. Two of the cards have been marked with winning numbers. What is the probability that at least one of the 3 cards has a winning number?

Three cards are selected at random from a group of 7. Two of the cards have been marked with winning numbers. What is the probability that at least one of the 3 cards has a winning number?
0 0
Next > < Previous
ReportAnswer #1

Let's first look at the probability of no winning card:

Explanation:

First card non-winning: #5/7#

Second card non-winning: #4/6=2/3#

Third card non-winning: #3/5#

#P("non-winning")=cancel5/7xx2/cancel3xxcancel3/cancel5=2/7#

#P("at least one winning")=1-2/7=5/7#

answered by: MeneerNask
Know the answer?
Add Answer of:
Three cards are selected at random from a group of 7. Two of the cards have been marked with winning numbers. What is the probability that at least one of the 3 cards has a winning number?
Your Answer: Your Name: What's your source?
Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.