You multiply length times width times height.
P(s) = 45/125 = 0.360
P(A&C) = 38/125 = 0.304
Probability that one is not in Arts and Crafts = 1- P(A&C) = 1-0.304 = 0.696
Therefore,
Probability that the child selected is in swimming when its known they didn't sign for Arts and craft = Probability they signed for swimming * Probability that they didn't sign for Arts and Crafts = 0.360*0.696 = 0.25056
A scale factor of 3 was used
71% water
29% land
71:29= 2,448=> the amount of earth surface that is covered with water is ~2,5 times bigger than the amount of earth surface that is covered with land
If it is a rectangle the length would be 4cm
A=L×W
20=L×5
÷5. ÷5 divide both sides by 5
4=L and you get 4
