if a number is choosen between 100 and 999 includeing these
numberrs what is the provbabilty that the number selected
does not contain a 7 is
- 23 Answers
- 41193 Views
- Deshaw, Microsoft, Persistent, I also Faced
- E-Mail Answers
Answer Posted / mayank kumar
total numbers between 100 and 999 =900
number that have a digit 7 between 100 and 199 =19
similarly no. that have digit 7 between 200 and 699=5*19
number that have digit 7 between 700 and 799=100
number that have a digit 7 between 800 and 999 =2*19
so total number that have digit seven in them between 100 and 999 are=8*19+100 =252
so numbers that does not have 7 digit in them =900-252 =648
therefore required prob, p =648/900 = 0.72
| Is This Answer Correct ? | 6 Yes | 3 No |
Post New Answer View All Answers
two workers can type two pages in two minuets then how many persons can type 18 pages in 6 minuets
2 persons can finish a job in 8 days. First person alone can finish the work in 24 days. How many days does the second person take to finish the job?
xsqrt(0.09)=3 , then x equals
In 8*8 chess board what is the total number of squares refer oder
If A=Z, B=Y, C=X, .......... Z=A, Then LIMIT = ?
Ram spends half of his salary on household expenses, quarter for rent, 1/5th for medical expenses and the remaining he deposits in the bank. If his monthly deposits in the bank is Rs 50, what is his monthly salary ?
The average of the first 100 positive integers is?
How would you measure 4 liters using jugs of 3l and 5l? Give a few solutions to this problem?
One ball was dropped from 8ft height and every time it goes half of the height. How much distance it will travell before coming to rest.
A theif steals half the total no of loaves of bread plus 1/2 loaf from a backery. A second theif steals half the remaing no of loaves plus 1/2 loaf and so on. After the 5th theif has stolen there are no more loaves left in the backery. What was the total no of loaves did the backery have at the biggining.
Sunny ate 100 apples in five days, each day eating 6 more than the previous day. How many apples did he eat on the first day?
Each row of letters or numbers has a rule connecting them. Write the next number or letterin the brackets. 124 , 62 , 60 , 30 , 28 , 14 , (_ _ _)
If the area of a square has increased by 69%,by what % has its side increased?
George while driving along the highway saw road markers which are at equal distances from each other. He crosses the markers every 20 seconds. If he increases his speed by x meters per second, he crosses the markers at every 15 seconds. But if he increases his speed by y meters per second, he crosses the marker at every 10th second. If y-x = 40 meters per second, then what is the distance between two markers.
There are 1997 doors in the courts. 1997 people came out from each door. One door is closed. That many people came out from each door. This continues till a single person come out of the single open door. Find the no of people inside the court?
