Homework Help: Math (probability)

Posted by Maria on Wednesday, January 30, 2013 at 3:29pm.

Three members of a 12 person singing group are going to be chosen to sing a song in their coming concert.

A) how many different groups containing 3 people can be chosen from the 12 members of the singing group?

B) what Is the probability that mike and Jo will both be in the selected group?

Math (probability) - bobpursley, Wednesday, January 30, 2013 at 3:38pm
b. three choices
?MJ
?JM
J?M
JM?
MJ?
M?J so there are six ways to get it, so probability is 6*(1/12*1/11*10/10)

a. 3!/12!9!
Math (probability) - bobpursley, Wednesday, January 30, 2013 at 3:40pm
oops a. 12!/(3!9!)=12*11*10/6=11*10*2
check that

Answer this Question

Related Questions

Math - 2. Three members of a 12 person singing group are going to be chosen to ...
English - Project. 1. Listen to the song carefully and sing the song all ...
Probability - From a group of eight women and seven men, a committee of six is ...
probability - Suppose 1 person is picked at random from this group of dog owners...
English - 1. Listen to the following chant carefully. 2.Sing the chant together ...
Probability - Among a group of people, 10% are from NYC and 90% are not. All ...
conditional probability - Among a group of people, 10% are from NYC and 90% are ...
discrete math - "a club with 20 members must choose a three-person ...
Probability - 1) A group of students were asked about their itunes collection. ...
Math Probability - At a political rally there are 20 republicians 13 democrates ...

For Further Reading

First Name:
School Subject:
Answer: