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

Answers were Sorted based on User's Feedback



if a number is choosen between 100 and 999 includeing these numberrs what is the provbabilty that t..

Answer / naveen

no. of occurrences of 7 in
100-199 =
107,117,127,137,147,157,167,170,171,172,173,174,175,176,177,178,
179,187,197 =19

lly for
200-299=19
300-399=19
400-499=19
500-599=19
600-699=19
now
700-799=100
800-899=19
900-999=19

total =8*19+100=152+100=252

probability = 1-(252/899)=0.71

Is This Answer Correct ?    5 Yes 8 No

if a number is choosen between 100 and 999 includeing these numberrs what is the provbabilty that t..

Answer / yk

629/900

Is This Answer Correct ?    1 Yes 4 No

if a number is choosen between 100 and 999 includeing these numberrs what is the provbabilty that t..

Answer / ankit kumar

Total numbers between 100 & 999 = 900 (including both)

Possible combinations for conaiting 7:
7** = 1x9x9=81
*7* = 8x1x9=72
**7 = 72
77* = 9
7*7 = 9
*77 = 8
777 = 1
Total = 252
Therefore probability = 252/900 or 7/25

Is This Answer Correct ?    0 Yes 3 No

if a number is choosen between 100 and 999 includeing these numberrs what is the provbabilty that t..

Answer / fayaz

no.of numbers having 7 between 100 & 999 (inclusive)=280(by combination)
total numbers between 100& 999(inclusive)=900

probability of having 7 in the chosen no.=280/900=.311

thus probability of not having 7 in chosen no.=1-.311=0.688

Is This Answer Correct ?    1 Yes 4 No

if a number is choosen between 100 and 999 includeing these numberrs what is the provbabilty that t..

Answer / sunil

0.71

Is This Answer Correct ?    3 Yes 7 No

if a number is choosen between 100 and 999 includeing these numberrs what is the provbabilty that t..

Answer / praveen

32/45

Is This Answer Correct ?    11 Yes 17 No

if a number is choosen between 100 and 999 includeing these numberrs what is the provbabilty that t..

Answer / sandhya

let take xyz as number that can qualify our condition...

x can have capable of arranging in 8 ways bcoz 0 and 7 are
omitted..
y can can have capable of arranging in 9 ways bcoz 7 is
omitted...

z also same as y.
so totally we can get 8*9*9 ways and total numbers exist in
b/w 100 and 999 is 899

so the answer is 8*9*9/899

Is This Answer Correct ?    3 Yes 9 No

if a number is choosen between 100 and 999 includeing these numberrs what is the provbabilty that t..

Answer / paresh

Total number between 100 and 900 are 888
from 700-799 total numbers are 100
100-199 numbers containing 7 are 107,117,...170-179,187,197
are 19
now total numbers from 100-900 except 700-799 are 19*7 = 133
so finally numbers containg 7 are = 133+100 = 233

Probability that number do not have 7 is = 1-233/888 = .737

Is This Answer Correct ?    3 Yes 11 No

if a number is choosen between 100 and 999 includeing these numberrs what is the provbabilty that t..

Answer / ajay

656/900

Is This Answer Correct ?    2 Yes 11 No

if a number is choosen between 100 and 999 includeing these numberrs what is the provbabilty that t..

Answer / vicky

total numbers between 100 and 999 is 888.
between 100 and 2oo,ther are 11 numbers with 7.
similar case for all the intervals.but from 700 to
8oo,there are 100 numbers with 7.
so,totally,
7*11+100=177
therefore,the probability of not having 7 is
1-(177/888)=0.8006

Is This Answer Correct ?    1 Yes 14 No

Post New Answer

More General Aptitude Interview Questions

3978 + 112 x 2 = ? ? 2 (a) 8180 (b) 2101 (c) 4090 (d) 8404 (e) None of these

8 Answers  


Ques--Input a number and then find the next higher number such that for both the number (inputted and the next higher number) in binary representation contains equal number os ones. Example: Input:3(0000000000000011) Ouput:5(0000000000000101) I want a solution in C/C++ language

2 Answers   Nagarro,


If the % of defective balls is 10% balls,and the number of defective balls is 5.The number of balls is

0 Answers   TATA,


rrb second stage written exam in aptitude test model papers

0 Answers   RRB,


Determine the distance between x-intercept and 2-intercept of the plane where equation is 6x+8y-32=72.(pls give me the answer with a clear solution)

4 Answers   TCS,






In 3.5 Kg rod , there is 74% silver. If it is alloyed with a 0.5 Kg rod, the % of silver goes p to 84%. The percent of silver in 0.5 Kg rod?

3 Answers   Mascot,


In which of the system, decimal number 194 is equal to 1234?

0 Answers   Accenture,


Please provide me the previous year questions for the Officer Trainees HR of HPCL, the exam is on march 2nd

0 Answers   HPCL,


A sales person multiplied by a number and get the answer 3. Instead of that number divided by 3. What is the answer she actually has to get.

1 Answers   TCS,


15 Men take 21 days of 8 hrs. each to do a piece of work. How many days of 6 hrs. each would do if 21 women take. If 3 women do as much work of 2 men.

0 Answers   IIT Delhi,


Two persons start at the same point, walk in opposite directions with 5km/hr and 5.5km/hr respectively. What is the distance separated after 2 and half hrs?

0 Answers   Hexaware,


distance D=rt where r & t are +ve and r is constant,as t increases then D_________

0 Answers   Wipro,


Categories