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Ilia_Sergeevich [38]
3 years ago
14

A man buys a book for Rs 400 and sells it for Rs 420 his profit is​

Mathematics
2 answers:
motikmotik3 years ago
6 0

Answer:

20

Step-by-step explanation:

420-400=20

Bogdan [553]3 years ago
4 0
Answer:
20 Rs

Explanation:

Buys for :400 Rs
Sells for:420 Rs

Work :

420-400=20 Rs in profit
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Х
ivolga24 [154]

Using permutations and the probability concept, it is found that there is a 0.0417 = 4.17% probability that Nia is chosen as president.

  • A probability is the <u>number of desired outcomes divided by the number of total outcomes</u>.
  • As there are different roles, the order in which the students are chosen is important, hence, the <em>permutation </em>formula is used to solve this question.

Permutation formula:

The number of possible permutations of x elements from a set of n elements is given by:

P_{(n,x)} = \frac{n!}{(n-x)!}

Desired outcomes:

  • Nia's president.
  • For the other roles, 3 students from a set of 23, hence:

D = P_{23,3} = \frac{23!}{20!} = 10626

Total outcomes:

4 students from a set of 24, hence:

T = P_{24,4} = \frac{24!}{20!} = 255024

Then:

p = \frac{D}{T} = \frac{10626}{255024} = 0.0417

0.0417 = 4.17% probability that Nia is chosen as president.

To learn more about probabilities, you can take a look at brainly.com/question/24437717

8 0
2 years ago
Hey! i’ll give brainliest please help
netineya [11]

Answer:

The last one looks correct

Step-by-step explanation:

Because if they have stronger winds then that would improve their flight making them get use to it, and will for sure get stronger over time

8 0
2 years ago
Classify Angle 1 &amp; Angle 2 by choosing the correct term from the choices below.
r-ruslan [8.4K]

Answer:

vertical

Step-by-step explanation:

did the test

5 0
2 years ago
Choose correct graph with following function
anyanavicka [17]

Answer:

Step-by-step explanation:

From the function, y = cos (3x)

Inputting values of x (horizontal axis), x = pi

y = cos (3 × pi)

= -1 ( remember you are dealing with values in radians not degree)

So now graph 1 and 3 have the same values. So inputting, x = pi/2 into the function, y = cos (3x)

= cos ((3 × pi)/2)

= 0

View the correct graph below.

6 0
3 years ago
Can someone please give me the answer I will mark u brilliant
otez555 [7]

Answer:

4. option A ---> m = 65h

Step-by-step explanation:

According to the question it states that,

  • m --> number of miles traveled.
  • h --> <u>over</u> hours

Now if we look at the table we need to find the starting point, or in other words, how much distance traveled in 0 hours. So we would divide miles / hours.

*Four hours, the variable in the question and in the table says n, but the answer choices says h, so I am saying h for hours just if you were wondering on it.*

distance (m) / hours (h)

130 / 2 = 65

195 / 3 = 65

325 / 5 = 65

455 / 7 = 65

So, our starting point, or numbers of miles traveled in 0 hours was 65. Now let us form an equation.

m = 65h

I would appreciate if you give me the brainlist or not. Hope this helps and stay safe, happy, an healthy, thank you :) !!

3 0
3 years ago
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