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 ...
- conditional probability - Among a group of people, 10% are from NYC and 90% are ...
- Maths - From a group of 10 people, 5 men and 5 women, six are to be chosen to ...
- Probability - Among a group of people, 10% are from NYC and 90% are not. All ...
- Math - Among a group of people, 10% are from NYC and 90% are not. All people ...
- Counting and Probability - One member of the debate team is going to be chosen ...
- integrated math 1- please help!!! - Among a group of people, 10% are from NYC ...
- math - The table below shows the drink preferences for people in 3 different age...
- math help - In 2011 a spots club offers its members three types of activities: ...
- Math - A standard deck of playing cards is shuffled and three people each choose...

More Related Questions