Fifteen boys and fifteen girls entered a drawing for four free movie tickets. What is the probability that all four tickets were won by girls? . Question 25 in the book.
Here only boys and girls is mentioned, hence the order is not of importance. So it is a Combination problem. Probability = Favourable/Desired Outcomes / Total Outcomes Desired Outcomes = 15C4 = 1,365 Total Outcomes = 30C4 = 27,405 Probability = 1365/27405 = 13/261 = 4.98%
Thank you sooo muchh!!!! this is so helpful, thank you!
You are most welcome 😊
Thank you I'm 10 general and we study this lesson in term 3 this is so helpful❤️❤️
thank you mr , can you do lesson 5 for class 10
I will try to do them soon. With my personal stuff going on, it is being hard to manage making the videos.
I will try to do it by tomorrow.
Lesson 7.5: ruclips.net/video/s9eCNS34XLs/видео.html
Fifteen boys and fifteen girls entered a drawing for four free movie tickets. What is the probability that all four tickets were won by girls?
.
Question 25 in the book.
Here only boys and girls is mentioned, hence the order is not of importance. So it is a Combination problem.
Probability = Favourable/Desired Outcomes / Total Outcomes
Desired Outcomes = 15C4 = 1,365
Total Outcomes = 30C4 = 27,405
Probability = 1365/27405 = 13/261 = 4.98%