12/15 + 1/10 <span>and got an answer of 13/25
</span><span>12/15 is close to 1, but he got an answer of 13/25 is close to 1/2
13/25 < 12/15
Answer:
</span><span>
His answer is not correct because the sum cannot be less than either addend.</span>
<span>So we need to find the average speed of the bus that travels 20 km in 30 minutes. Average speed is defined as: Average speed=distance travelled/time taken or: v=s/t. We know s=20 km and t=30 minutes=0.5h. So after we input our numbers in the equation, we get: v=20km/0.5h=40km/h. So the correct answer is C) 40km/h.</span>
We are interested in selecting 2 people from the 7-person task force.
n = 7
r = 2
nPr = n! / (n-r)!
7!
------
(7-2)!
=
7!
----
5!
7×6×5×4×3×2×1
------------------------
5×4×3×2×1
= 7×6
= 42
