Down syndrome

Down syndrome is one of the serious diseases caused by a gene mutation. Down syndrome occurs in approximately every 550-born child. Express the incidence of Down's syndrome in newborns at per mille.

Result

p =  1.818 ‰

Solution:

p=1000⋅ 1550=2011≐1.8182≐1.818 ‰p=1000 \cdot \ \dfrac{ 1 }{ 550 }=\dfrac{ 20 }{ 11 } \doteq 1.8182 \doteq 1.818 \ ‰

Try another example


Our examples were largely sent or created by pupils and students themselves. Therefore, we would be pleased if you could send us any errors you found, spelling mistakes, or rephasing the example. Thank you!





Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...):

Showing 0 comments:
1st comment
Be the first to comment!
avatar




Tips to related online calculators
Our permille calculator will help you quickly calculate various typical tasks with permilles.

Following knowledge from mathematics are needed to solve this word math problem:

Next similar math problems:

  1. Gloves
    rukavice I have a box with two hundred pieces of gloves in total, split into ten parcels of twenty pieces, and I sell three parcels. What percent of the total amount I sold?
  2. TVs
    tv Production of television sets increased from 3,500 units to 4,200 units. Calculate the percentage of production increase.
  3. The percentages in practice
    plodina If every tenth apple on the tree is rotten it can be expressed by percentages: 10% of the apples on the tree is rotten. Tell percent using the following information: a. in June rained 6 days b, increase worker pay 500 euros to 50 euros c, grabbed 21 fr
  4. Equation
    rovnice_3 Solve the equation: 1/2-2/8 = 1/10; Write the result as a decimal number.
  5. Class
    children_2 In a class are 32 pupils. Of these are 8 boys. What percentage of girls are in the class?
  6. Apples 2
    jablko James has 13 apples. He has 30 percent more apples than Sam. How many apples has Sam?
  7. Sales off
    up_to_30 Goods is worth € 70 and the price of goods fell two weeks in a row by 10%. How many % decreased overall?
  8. Percents - easy
    percents_5 How many percent is 432 out of 434?
  9. Number
    percent What number is 20 % smaller than the number 198?
  10. MO 2016 Numerical axis
    osa Cat's school use a special numerical axis. The distance between the numbers 1 and 2 is 1 cm, the distance between the numbers 2 and 3 is 3 cm, between the numbers 3 and 4 is 5 cm and so on, the distance between the next pair of natural numbers is always in
  11. New refrigerator
    lednice New refrigerator sells for 1024 USD, Monday will be 25% discount. How much USD will save, and what will be the price?
  12. Unknown number
    nums Identify unknown number which 1/5 is 40 greater than one tenth of that number.
  13. Conference
    conference 148 is the total number of employees. The conference was attended by 22 employees. How much is it in percent?
  14. Base, percents, value
    percent_1 Base is 344084 which is 100 %. How many percent is 384177?
  15. Simplify 2
    expr Simplify expression: 5ab-7+3ba-9
  16. Inequation
    inequalities Solve the inequation: 5k - (7k - 1)≤ 2/5 . (5-k)-2
  17. Car crash
    alkohol-tester-alkohol-za-volantom_2 After a traffic accident, police measured 1.16 permille of alcohol in the driver's blood. What amount of alcohol did the driver have in the blood when about 5 kg of blood circulates in the human body?