Read and follow the directions below.
Start with a full deck of cards.
Remove all four jacks and four kings.
Add back in the red jacks.
Remove the eights.
Remove half the remaining cards at random.
Which of the following tells the number of cards now in the deck?
A deck has 52 cards. Removing the jacks and kings reduces the deck to 44. There are 2 red jacks, so adding them back in makes the total 46. Removing the four eights reduces the number to 42. Divide that number by two and we get the final total of 21.