You own 6 hats and are taking 2 on vacation. in how many ways can you choose 2 hats from the 6?

15

How to get this

There are 6 ways to pick the first hat and then 5 ways to pick the next hat (since you can't pick the same hat again). Giving 6*5 = 30 ways to pick the two hats. Imaging drawing out a probability tree for this.

The value 30 would be the answer if order mattered, but it doesn't. If you label the hats A,B,C,D,E,F then picking hat A first and then hat C next is the same as picking C first and then A next. Order does not matter.

To correct things, we divide by 2. Why 2? Because we're double counting. So we go from 30 to 30/2 = 15.

d is correct

step-by-step explanation:

the camry sales+accord sale=828,000. to make it so the two numbers are 18 thousand apart and still equal 828,000, you first need to find out what half of 828,000 is. 828,000/2=414,000. for the two numbers to equal 828,000, you have to add the same amount as you subtract from the middle. in this case, the number is 9,000 because it's half of 18,000. to equal 828,000, you have to add 9,000 to 414,000 for the camry and subtract 9,000 from 414,000 for the accord. 414,000+9,000=423,000.

414,000-9,000=405,000.

423,000+405,000=828,000.

423,000-405,000=18,

hope it