23, 25, 26
32, 35, 36
52, 53, 56
62, 63, 65
How many 2-digit numbers can be formed using only the digits 2, 3, 5, and 6, if the digits are not be repeated within a number?
A.11
B.12
C.10
D.2
I just don't understand
5 answers
The tens place can be filled in 4 ways
for each of those, the unit place can be filled in 3 ways
number of such numbers = 4 x 3 = 12
(count the numbers that Ms Sue gave you)
for each of those, the unit place can be filled in 3 ways
number of such numbers = 4 x 3 = 12
(count the numbers that Ms Sue gave you)
Thanks
You're welcome.
THANK YOU SO MUCH!!!
2 answers