It isn't always going to be a 50/50 chance. You would think it would go back and forth between heads and tails every time, but it doesn't because there is a 50% chance it could land on the same side again.
You'd say that although that seems correct, since there's a 50/50 chance of each outcome, it doesn't necessarily guarantee that it will ALWAYS be 50/50. However, her guess has the highest probability of occurring, or in other words, its more likely that it'll be somewhere close to 240 rather than in the 100's or 300's.
(perimeter of a rectangle) 2w + 2l l = 2w + 3 (length is 3 more than twice the width)P = 78 Plug in the variable values:78 = 2(2w + 3) + 2w78 = 4w + 6 + 2w78 = 6w + 670= 6w 11.6= w
