1500 is your answer hope it helps
Step-by-step explanation:
$480 is 40% off the original price
=> $480 is 60% of the original price
Hence the original price is $480 * (100/60) = $800.
Assuming 100% = 1, there is a 0.3 chance of 30 points, 0.55 chance of 100 points, and 0.15 chance of 400 points. Multiplying the chance with the expected values and then adding them up will give you the expected value of one roll.
0.3(30) + 0.55(100) + 0.15(400) = 124
So the expected value of a roll is 124 points
The absolute value for that is 21-63
7% of x = 450
0.07×x=450
x=450/0.07
x=6428.6 to the nearest tenth (one decimal place)