Posted by marie s on Tuesday, August 23, 2011 at 6:10pm.
a political discussion group consists of five Democrats and six Republicans. Four people are selected to attend a conference.
A.in how many ways can four people be selected from this group of eleven?
B.In how many ways can four Republicans be selected from six Republicans?
C.find the probability that the selected group will consist of all Republicans?

math  deja, Tuesday, August 23, 2011 at 6:19pm
the answer is "C"

math  marie s, Tuesday, August 23, 2011 at 6:21pm
Thanks, but i need the answer to all three questions

math  Reiny, Tuesday, August 23, 2011 at 6:23pm
A) choose 4 from 11 which is C(11,4) or 330
b) choose 4 from 6 which is C(6,4) or 15
c) assuming that your group still consists of 4 people
prob = 15/330 = 1/22

math  marie s, Tuesday, August 23, 2011 at 6:24pm
thank you

math  drwls, Tuesday, August 23, 2011 at 6:25pm
A. 11 x 10 x 9 x 8/(4 x 3 x 2 x 1) = 330
B. 6!/(4!*2!) = 15
C. (6/11)*(5/10)*(4/9)*(3/8) = 0.04545

math  Anonymous, Monday, May 5, 2014 at 5:44pm
What is the cost of concrete for a walkway that is 15 feet long, 8 feet wide, and 9 inches deep if the concrete costs $30 per cubic yard?

math  dick schweizer, Thursday, June 2, 2016 at 2:51pm
$100
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