Answer:
The leave together every 90 minutes
Step-by-step explanation:
The leave together every 90 minutes:
bus A : 30 + 30 + 30 = 90
bus B : 45 + 45 = 90
Because 21 is more than 1
43% chance because 43% of them are yellow!
The answer is 0.6 . 3 divide 5 is 0.6
Answer:
The answer is %2,4
Step-by-step explanation:
Residents can press on 10 different button choice when they enters the elevator. Number of components for the sample space for the event is

There are 8 different possibilities that 3 consecutive buttons are pressed those are:
-1,2,3
-2,3,4
-3,4,5
-4,5,6
-5,6,7
-6,7,8
-7,8,9
-8,9,10
When the pressing order doesn't matter, those buttons can be pressed 3 different ways for each possibility.

The probability is:
