Two cards are selected from a standard deck of 52 playing cards. the first is replaced before the second card is selected. find the probability of selecting a diamond and then selecting a king.

Hello!

If a card is replaced, both probabilities will be out of the same amount of cards as it was replaced.

First of all, 1/4 of the cards are diamonds, so we have a 1/4 chance of selecting a diamond.

Next, there are four kings in the deck, and 4/52 is equivalent to 1/13.

Finally, we multiply the two probabilities, so 1/13·1/4=1/52.

There is a 1/52 chance of this event.

Hope this helps!

 
Shelby has 11 dollars than Justin. Justin has 1 ten  dollar bill and 9 one dollar bills ( also know as $19)  less than Julie. Julie has $40, so how many dollars does Shelby have?

Steps to solve + answer to problem: 
1. 40 - 19=  21
2. 21 is the amount of money Justin has.
3. 21 + 11 = 32 
4. 32 is the amount Shelby has.
Answer : Shelby has $32.