Answer:
480,700 sets (first choice)
Step-by-step explanation:
If all 25 questions are different,
When order of selection counts:
P(25,7)
= 25!/(25-7)!
= 15511210043330985984000000/6402373705728000
= 2422728000
When order of selection does not count count:
C(25,7)
=25!/(7!*(25-7)!)
=15511210043330985984000000/(6402373705728000*5040)
= 480,700
Hope this helps, have a nice day.
Answer:
5i![\sqrt{3}](https://tex.z-dn.net/?f=%5Csqrt%7B3%7D)
Step-by-step explanation:
Using the rule of radicals
×
⇔ ![\sqrt{ab}](https://tex.z-dn.net/?f=%5Csqrt%7Bab%7D)
and
= i
Given
![\sqrt{-75}](https://tex.z-dn.net/?f=%5Csqrt%7B-75%7D)
= ![\sqrt{25(3)(-1)}](https://tex.z-dn.net/?f=%5Csqrt%7B25%283%29%28-1%29%7D)
=
×
× ![\sqrt{-1}](https://tex.z-dn.net/?f=%5Csqrt%7B-1%7D)
= 5 ×
× i
= 5i
If you would like to know how many centimeters are 27 millimeters, you can calculate this using the following steps:
1 cm ... 10 mm
x cm = ? ... 27 mm
1 * 27 = 10 * x
27 = 10 * x /10
x = 27/10
x = 2.7 cm
The correct result would be 2.7 cm.