A) Solve for X: 10-(-5)+7=-10-(-3)+12-X

B) A fraction changed from 1/5 to 7/8. The numerator changed by what % and the denominator changed by what %.

C) Assume a normal distribution with an average return of 7% and a standard deviation of 3%. Which probability would be correct

i. 68% chance of an actual return above 10% or below 4%

ii. 16% chance of ana ctual return below 4%

iii. 2.5% chance of an actual return above 1%

iv. 0.5% chance of an actual return above 13%