Looks like both questions deal with combination, that is, the order
of selecting objects does not matter.
#1 , you are choosing 4 from 52 which is
C(52,4) or 52C4
= 270725
most scientific calculators have that as a function.
look for nCr, on mine it is paired with the "5"
enter:
52
2ndF
4
#2, how many groups of 2 can you choose from 5 ?
=
1. Four cards are drawn in succession, without replacement, from a standard deck of 52 cards. How many sets of four cards are possible?
270,725
6,497,400
54,145
1,082,900
2. A cola company decides to test five different brands of soft drink. The different brands have been labeled F, G, H, I, and J. The company decides to compare each brand with the other brands by pairing them together. How many different pairs will result from selecting two different brands at a time?
25
20
12
10
4 answers
i still don't understand number two though
Thanks though, I passed the quiz
#2 each of the 5 can pair with any of the other 4 ... 5 * 4 = 20
... BUT ... A and B is the same group as B and A ... so, only half of 20
... BUT ... A and B is the same group as B and A ... so, only half of 20
1 answer