A few days ago
Help me with this probability queston, please?
Help me with this probability question, please?
And show/explain how to get the result?
Thank you. <3 A bunch. From a class of 30 children, i must select a line of ten. How many different selections can I make? Express your answer in terms of factorials. What if I just want to pick a group of ten (order does not matter)? Again, express your answer in factorials. Thank you!
Top 3 Answers
A few days ago
Favorite Answer
You would use the Combinations formula b/c the order does not matter:
n = 30
r = 10
/ refers to divided by
C = 30! / 10!(30-10)!
C = 30! / 10!(20)!
C = Use a calculator to solve this b/c its a really long number but I’m pretty sure that this is the way to solve it…
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5 years ago
There are four aces in a pack of cards and there are 13 diamonds. These overlap, so that one ace is a diamond. Given you have a diamond, there is a one in 13 chance that it is an ace 1/13 = 4/52 (standard notation for cards is to put odds in terms of 52) Given you have an ace, there is a one in 4 chance that it is a diamond 1/4 = 13/52 (standard notation)
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A few days ago
if order is not important, then this is a combination
C(30,10)
which is P(30,10)/10!=30045015
if order is important –
permutation….30x29x28….x21 = 1.09 x 10^14
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