Numbers are formed using the digits 1, 2, 3, 4, 5, 6. If no digit may be repeated, how many two-digit numbers can be formed
A. 15
B. 20
C. 30
D. 6

I got 20.

I may have done it wrong so maybe wait until others have answered.

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right

step-by-step explanation:

what does 'mandy have ben 780 bottle caps. ' mean?