1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Komok [63]
3 years ago
7

Express this sum using summation notation 1+1/2+1/3+1/4+1/5+1/6

Mathematics
2 answers:
kumpel [21]3 years ago
5 0

Answer:

\sum_{n=1}^{6}\frac{1}{n}\text{ or }\sum_{n=0}^{5}\frac{1}{n+1}

Step-by-step explanation:

\frac{1}{1}+\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+\frac{1}{5}+\frac{1}{6}=\sum_{n=1}^{6}\frac{1}{n}\text{ or }\sum_{n=0}^{5}\frac{1}{n+1}

vesna_86 [32]3 years ago
4 0

Answer:

21

Step-by-step explanation:

the sum of the express of the summation of the notation

You might be interested in
A poker hand consisting of 7 cards is dealt from a standard deck of 52 cards. Find the probability that the hand contains exactl
77julia77 [94]

Answer:

The probability is 2,010,580/13,378,456

Step-by-step explanation:

Here is a combination problem.

We want to 7 cards from a total of 52.

The number of ways to do this is 52C7 ways.

Also, we know there are 12 face cards in a standard deck of cards.

So we are selecting 3 face cards from this total of 12.

So also the number of cards which are not face cards are 52-12 = 40 cards

Out of all these 40, we shall be selecting exactly 4. The number of ways to do this 40C4

Thus, the required probability will be;

(40C4 * 12C3)/52C7 = (91,390 * 220)/133,784,560

= 20,105,800/133,784,560 = 2,010,580/13,378,456

7 0
3 years ago
At the end of a year, the gross debt of a country stood at about $17 trillion. Express this amount
Maru [420]
56,105.61 is the answer rounded to the nearest hundred
5 0
3 years ago
Read 2 more answers
For a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of 50
Volgvan

Answer:

P(\bar X>530)=1-0.808=0.192

Step-by-step explanation:

1) Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Let X the random variable that represent the scores, and for this case we know the distribution for X is given by:

X \sim N(\mu=505,\sigma=170)  

And let \bar X represent the sample mean, the distribution for the sample mean is given by:

\bar X \sim N(\mu,\frac{\sigma}{\sqrt{n}})

On this case  \bar X \sim N(505,\frac{170}{\sqrt{35}})

2) Calculate the probability

We want this probability:

P(\bar X>530)=1-P(\bar X

The best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}

If we apply this formula to our probability we got this:

P(\bar X >530)=1-P(Z

P(\bar X>530)=1-0.808=0.192

3 0
3 years ago
A car travels a distance of 360 km in a time of 3 hours. <br> What is the car's average speed?
denpristay [2]

Answer:

convert km into m

1 km=1000m

360 km=1000*360m

=360000m

again,convert 3 hours into seconds

3 hours=60*60*3

=10800 second

average spped=total distance /time taken

=360000/10800

=33.33 m/s

Step-by-step explanation:

3 0
3 years ago
Find the greatest common factor of the terms in the following expression: 30xy + 15xyz.
myrzilka [38]

Answer:

The answer is 15xy

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Other questions:
  • a vase has 6 flowers in it. there are 3 roses, 1/3 are peonies, and the rest are lilies. what fraction of the flowers are lilies
    7·2 answers
  • Please help me! Screenshot of question is attached. 15 Points and Brainliest to the correct answer.
    5·1 answer
  • Solve using factoring
    11·1 answer
  • Help me I NEED HELP ASAP
    9·1 answer
  • Please help. so confused on this one​
    12·1 answer
  • The sum of two numbers is 14. When one number is added to twice the other number, the result is 25. Find the numbers
    14·1 answer
  • Vladimir buys 1.20 pounds of Skittles, 312 pounds of M&amp;Ms, and 5.2 pounds of pretzels. If the candy cost $1.20 a pound and t
    8·1 answer
  • What’s the unit rate of y = 6x
    7·1 answer
  • Select all that show a 16% increase or decrease.
    8·1 answer
  • Pls help extra points and mark brainlist <br> 
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!