Answer / guest

1 in 10,000,000

There are 10 digits i.e. 0-9. First digit can be dialed in
10 ways. Second digit can be dialed in 10 ways. Third digit
can be dialed in 10 ways. And so on.....

Thus, 7-digit can be dialed in 10*10*10*10*10*10*10
(=10,000,000) ways. And, you have just one telephone number.
Hence, the possibility that you will dial your own number is
1 in 10,000,000.

Note that 0123456 may not be a valid 7-digit telephone
number. But while dialing in random order, that is one of
the possible 7-digit number which you may dial.

Answer / raju

Here is the answer :
Suitable condition are only 1.
Total conditions are 9 X 10 X 10 X 10 X 10 X 10 X 10 = 9000000.

I am taking the first digits as 9 because if phone number is
7 digit is cannot have ZERO at the start. so probablity is :
1 / 9000000

Answer / george prasanna

I agree with Raju...

the seven positions are


- - - - - - -


first position (1-9)=9 ways
second position (0-9)=10 waya
third position (0-9)=10 waya
fourth position (0-9)=10 waya
fifth position (0-9)=10 waya
sixth position (0-9)=10 waya
seventh position (0-9)=10 waya

so one in 9x10^6 ways

so probability is 1/9000000

Answer / vicky

possible numbers tat can be pressed r 0-9.totally ten.
but,we r going to have our telephone number as a 7digit....
overall probability is 10c7.
but,to select a number from 0 to 9 once,our required
probability is 10c1..we r gonna use it 7 times as they
didn't mention about the repetition of values.
so,the probability of choosing a number is 7times 10c1.
therefore,the answer might be
(7*10c1)/(10c7)
=70/120
=.583333333

Answer / bubble

isn't it 999,999,999?? think about it

Answer / roop anand

tot no.of digits in telephone is 10(0-9)
in tat no of digits to be pressed is 7.
so the prob = 7C1/10C7
=7/720
=.01

What is the four-digit number in which the first digit is 1/3 of the second, the third is the sum of the first and second, and the last is three times the second?

5 Answers  

Three friends divided some bullets equally. After all of them shot 4 bullets the total number of bullets remaining is equal to the bullets each had after division. Find the original number divided.

16 Answers   Directi, Infosys, L&T, Shreyas, TCS, Turing Software,

Each of the five characters in the word BRAIN has a different value between 0 and 9. Using the given grid, can you find out the value of each character? B R A I N 31 B B R B A 31 N I A B B 32 N I B A I 30 I R A A A 23 37 29 25 27 29

1 Answers  

Given two bucket of large capacity. There are 100 black ball and 100 white ball. Distribute the balls among two bucket such that probability of choosing a white ball is maximum.

3 Answers   Oracle,

There are 3 lights (in one room) and 3 swtiches (in another room), one for each, if you only enter into the light room once. How can you find out which switch corresponds to which light?

12 Answers   Lucent,

Love love it.. friends need it.. relationing start with it.. life ends with it..

15 Answers  

P pages read in d mins after day p+1 pages read in d+1 mins last day 379 pages done in 317 mins find p+4

0 Answers   Zoho,

If A+B=C, D-C=A and E-B=C, then what does D+F stands for? Provide your answer in letter terms as well as in number terms.

1 Answers  

Certain words are coded as follows : BEAR-9281, DRUM-0683,PRY- 485 AND DOOR-7899.What is the code for ‘R’?

2 Answers   Satyam,

in a family there are 5 members viz. parents and 3 children. the member are A,B,C,D AND E out of which 2 are males and 3 are females. A has 3 childerns, 2 daughters and 1 son. c in B's son. A in D's father. 1.how is E related to B? 2.who is D's mother? give me solution plese.

2 Answers  

Arrange these words into a romantic word D P G E O D S?

5 Answers   Google,

how do i improve my logical questions. is there any website?

1 Answers