Probability question ?
9 boys and 12 girls on a trip. There’s 6 students that will be selected to go. What is the probability that only girls will be on the trip. Round to the nearest thousandth.
9 boys and 12 girls on a trip. There’s 6 students that will be selected to go. What is the probability that only girls will be on the trip. Round to the nearest thousandth.
?
There are thus 21 students to choose from.
There is a prob of 12/21 for the first chosen be a Girl.
Then, there is a prob of 11/20 for the next chosen be a Girl.
Then, there is a prob of...
See the pattern? Six times.
The sought prob is the multiplication of these six probs.
Final answer = ?
Done!