There are 10 students in a class: 3 boys and 7 girls. If the teacher picks a group of 3 at random, what is the probability that everyone in the group is a girl?
2 answers:
Probability the first pick is a girl: 7/10
Probability the second pick is a girl: 6/9
Probability the third pick is a girl: 5/8
Probability of picking 3 girls:
7/10 * 6/9 * 5/8 =
= (7 * 6 * 5)/(10 * 9 * 8)
= (7 * 1 * 1)/(2 * 3 * 4)
=7/24
Approximately 0.29 = 29%
You might be interested in
Answer:
it is 2.83
Step-by-step explanation:
Answer: AC = 7√3
tan 30° =
=>
Step-by-step explanation:
Answer:
It is a straight object that begins at a point and extends forever in one direction. It is a straight object that extends infinitely in opposite directions without any width or thickness.
Answer:
Step-by-step explanation:
dn3edhb3rbrjfnfjbhghrbhjbrhhb fh3hfnhbjnjhbjffjhnj3 njn
