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amid [387]
3 years ago
13

A computer password system requires 6 DIFFERENT letters (case sensitive) from the 26 alphabets. For example, AAAAAA and aaaaaa a

re two different passwords. Is this a PERMUTATION or a COMBINATION problem? How many passwords can be created?
Mathematics
1 answer:
Arlecino [84]3 years ago
3 0

Answer: 325

Step-by-step explanation:

Combination is a way to calculate the total outcomes of an event where order of the outcomes does not matter where as a Permutation is a way of arranging the elements of a set into a order or a sequence . Here order matters.

If we want to create password with 6 different letters then order matters.

Hence, we use permutations.

The number of passwords created is given by :-

^{26}P_6=\dfrac{26!}{2!(26-2)!}\\\\=\dfrac{26\times25\times24!}{2\times24!}=325

Hence, the number of passwords created = 325

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A bird flies 50km everyday to collect food for his offspring and 20km to drink water. To fly this distance takes him 1 hour and
dem82 [27]

Answer:

42km/h

Step-by-step explanation:

70km=100 minutes

7km= 10min

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42km/h

7 0
2 years ago
Martin is seating people in the cars of a roller coaster. Each car can seat 8 people. Six of the roller coaster cars are yellow
Mamont248 [21]

Answer:

The probability is 2/5

Step-by-step explanation:

Here, we want to calculate the probability that the first person will sit in a yellow roller coaster car

The number of cars to select from is 6 + 9 = 15 cars

The number of yellow cars is 6

So the probability that the first person selects a yellow roller coaster car to seat is 6/15 = 2/5

5 0
3 years ago
(Btw this is not a QOTD, but I might do another one later)
erastovalidia [21]
The answer is C $550
5 0
2 years ago
3/4 is 60% of what number
Mariana [72]
First change the fraction to percent. 
3/4 = 60%

Then change the percent to the decimal. 
60% = 0.75

Now multiply it.
<span>0.75 x 60% = 45
</span>
45 is the answer. 
3 0
3 years ago
4. Marcella has 4 fewer male cousins than female cousins. Let f represent the number of female cousins. Write an expression for
sladkih [1.3K]
F - 4 = number of boy cousins.
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