check your calculator for the [!] factorial button.
also bear in mind that most calculators also have an [ₙPᵣ] button, to get Permuations, and you can just use that.
Given the data below, the total length or amount of decorative trim can be calculated. It can be said that the total length of decorative trim is equal to the total perimeter of the two walls, the window, and the door, minus the base of the door.
Wall 1 = 2(8) + 2(18) = 52 ft.
Wall 2 = 2(8) + 2(15) = 46 ft.
Window = 2(3) + 2(6) = 18 ft.
Door = 2(7) + 5 = 19 ft.
Total length = 52+46+18+19 = 135 ft. of decorative trim
<u>First problem :</u>
probability to draw a red paper : 42/(42+18)=7/10
In 110 tries one can thus expect to draw 7/10*110=77 red papers
<u>Second problem :</u>
Since for 150 trials (which will give the least error) we have got 135 yellow balls, we can expect twice as much in 300=150*2 trials, which makes 270 yellow balls.
3|x - 2| - 10 = 11
3(x - 2) - 10 = 11 U 3(x - 2) + 10 = -11
3(x) - 3(2) - 10 = 11 U 3(x) - 3(2) + 10 = -11
3x - 6 - 10 = 11 U 3x - 6 + 10 = -11
3x - 16 = 11 U 3x + 4 = -11
3x - 16 + 16 = 11 + 16 3x + 4 - 4 = -11 - 4
3x = 27 U 3x = -15
3 3 3 3
x = 9 U x = -5
