What proportion of the first 10,000 natural numbers contain a 3
Answers
we know that
It is much easier to compute the number of numbers that do not contain a .
In the first numbers
do not contain a
.
In the first numbers
do not contain a
. (This is because these numbers are formed by selecting a digit out of
for the first position and another digit out of the same set for the last position and this may be done in
In the first numbers, reasoning as above, there are
numbers that do not contain a
.
Now the pattern should be becoming obvious.
In the first numbers there are
numbers that do not contain a
.
So
In the first numbers there are
numbers that do not contain a
.
Thus
the ratio of those numbers that do contain a 3 over the total is equal to
therefore
the answer is
In the first 100 -> 100 - 9 * 9 = 19 (contain a 3).
In the first 10^n -> 10^n - 9^n (contain a 3).
The answer is 3.439 numbers contain a 3 in the first 10.000
Related Questions
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Twenty-seven minus of a number (x) is not more than 36. What is the number?
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Please Help Will Give Brainliest If Correct!The line segment shown is rotated 90° about the origin (counterclockwise). What are the new coordinates of point A?A) (2, 1) B) (-2, 1) C) (-2, -1) D) (1, 2)
Answers
delta y = 520 - 325
delta x = 8 - 5
Be well.
a = b − 2
What is the solution to the set of equations in the form (a, b)?
(−2, −6)
(−7, −9)
(−11, −9)
(−12, −10)
Answers
Answer a = -11, b = -9
Answer:
third one
Step-by-step explanation:
true or false?
Answers
Answers
Answer:
31.25
Step-by-step explanation:
Answer:
31.25 is right.
Step-by-step explanation:
Answers
Answer:
7,071
Step-by-step explanation:
Answers
Answer:
Equations ; 1, 3 , 5 and 6 are correct
Step-by-step explanation:
From the question, we are told that 2 1/2 feet is 5/8 of the height of the tower to be built
Now, we want to get the equation for the height of the tower
we have this as follows;
since we do not know the height of the tower, we can represent it by ?
a. 5/8 of ? = 2 1/2
b. 2 1/2 divided by ? = 5/8
c. 2 1/2 • 8/5 = ?
d. 2 1/2 divided by 5/8 = ?