Three ventilation fans, each working alone, can clear the smoke out of a room in 12 hours, 16 hours, and 24 hours respectively. How long would it...
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Answer:
6
Step-by-step explanation:
Any of the three can be in first place.
Any of the remaining two can be in 2nd place.
The remaining swimmer will be in 3rd place.
There are 3 × 2 × 1 = 6 possible orderings of the swimmers.
Answer:
2nd option
Step-by-step explanation:
the mean is calculated as
mean = 
= 
= 
=
+ 
= x + 
Answer:
-16
Step-by-step explanation:
as you know you cant add positives so the answer would be a negative
ok so what plus 4 equals 20? 16.
therefore: -16
It’s the top one on the right side