Using the distance formula
Then we assign the points letter for simplicity
. The distance formula gives us the magnitude between two points hence,






Probability that the questions are answered corectly1/4 = 0.25
probability that they are answered wrong 3/4 = 0.75
probability that 4 out of 7 are corect 7C4(0.25)4(0.75)3 which equals 0.0577
Hi there!
As I saw in some other questions, I assumed this question is about unit rates..
So, the answer to this is 750 kb/m
Hope this helps!
The sale price of 3 bottles of shampoo is 3s and the regular price is 3r. The amount of money you save will only come in when you buy 3. The cost you save is the difference between the regular price and the sale price. The equation is therefore,
c = 3r - 3s