A restaurant with 25 tables has 4 tables by the window. Parties are seated randomly at the tables as they come in. What is the probability that the first 3 parties of the night are all seated at window seats?

I uploaded the answer to a file hosting. Here's link:

cutt.ly/zxt1ipy

94

step-by-step explanation:

average the numbers and use a variable to figure out the minimum to get a 90.

(79+94+91+92+x)/5=90

x = 94

11.2

step-by-step explanation:

when doing tangent the tangent of the angle is equal to the opposite side from the angle over the adjacent side to the angle.

tan43 = x / 12

move 12 over by multiplying each side by 12

12tan43 = x

x = about 11.2