Question

you have 8 marbles numbered 1-8, mix them up & draw 2. What are the chances that the #s are 4 & 7

Answer 1

2/8 * 1/7

Answer 2

the first marble is four or seven=2*1/8
the second marble is the the other number: 1/7

Pr= 2*1/8*1/7=