A first grade teacher uses eight playing cards, each numbered from 1 to 8 to teach her students to ...
A first grade teacher uses eight playing cards, each numbered from 1 to 8 to teach her students to order numbers correctly. She has students choose four flash cards randomly, then arrange the cards in ascending order. One day, she removes the cards '2' and '4' from the deck. On that day, how many different correct arrangements of four randomly selected cards are possible?
Answer/Solution
15
Steps/Work
problem of combination 6C4 = 6!/4!*(6-4)! = 6*5*4!/4!*2! =15
C
C