Two websites sell the same type of headphones. Cost of headphones
Website A - £49.95
Website B - £47.68
Cost of postage
Website A - £4.39
Website B - £6.95
Including the cost of postage which website is cheaper and by how much?​

Look at arnold's attempt to solve the equation for b: 3b = 12 b = 3 · 12 b = 36 describe the mistake that arnold made.

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.

I’m still confused on how to work the percentages