3 blocks are chosen randomly on a chessboard. What is the
probability that they are in the same diagonal?
- 3 Answers
- 21179 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / guest
There are total of 64 blocks on a chessboard. So 3 blocks
can be chosen out of 64 in 64C3 ways.
So the sample space is = 41664
There are 2 diagonal on chessboard each one having 8 blocks.
Consider one of them.
3 blocks out of 8 blocks in diagonal can be chosen in 8C3 ways.
But there are 2 such diagonals, hence favourables = 2 * 8C3
= 2 * 56 = 112
The require probability is
= 112 / 41664
= 1 / 372
= 0.002688
| Is This Answer Correct ? | 41 Yes | 26 No |
Answer / anu
as total blocks are 64
and diagonals are 2 having 16 blocks
so 16c3/64c3
or
16!/64!
| Is This Answer Correct ? | 2 Yes | 27 No |
A remote island contains a tribe whose members have either blue or brown eyes. Tribe members do not know the color of their eyes and if they learn it, they must kill themselves the same night. Every member of the tribe always behaves logically...
2 Answers ABC, Amazon, Microsoft,
IDear sir, I have had a data containing of 4 numbers on daily basis for which I would like to know what is the next comming 4 numbers. Based on that data I would like to find out the next comming numbers. Support needed. regards chandramohan gudivada 09849974512 cm116_99@yahoo.com Example : 4513, 4132, 1465, 2941, 1762, 1432, 3412, 5283, 7261, 2643, 4751, 2581, 6513 .... and what is the next number in the sequence?
There are 3 societies A, B, C. A lent cars to B and C as many as they had already. After some time B gave as many tractors to A and C as many as they have. After sometime c did the same thing. At the end of this transaction each one of them had 24. Find the cars each orginally had.
How long would it take you to count 1 billion orally if you could count 200 every minute and were given a day off every four years?
In how many iterations can we find one coin that is heavier than the others out of 8 coins?and how ?please reply
It comes once in a year and twice in a week what is that?
20 Answers AJ Square Inc, HCL, Infosys,
What is the ten letter city 7 8 9 is a famous festival 3 4 5 is a degree 2 1 is a abbreviation of group of countries 7 6 gives the meaning?
why should we hire the others waiting to be interviewed?
A big cube painted with yellow colour in all sides. if you cut it into 1000 cubes with same dimension. than how many cubes were without painted anyside. explain it?
12 Answers eBay, eClerx, Sitel, Wipro,
Two people enter a race in whick you run to a point and back. Person A runs 20 mph to and from the point. Person B runs to the point going 10 mph and 30 mph going back. Who came in first?
In country X, democratic, conservative and justice parties have fought three civil wars in twenty years. TO restore stability an agreement is reached to rotate the top offices President, Prime Minister and Army Chief among the parties so that each party controls one and only one office at all times. The three top office holders must each have two deputies, one from each of the other parties. Each deputy must choose a staff composed of equally members of his or her chiefs party and member of the third party. 1. When Justice party holds one of the top offices, which of the following cannot be true (a) Some of the staff members within that office are justice party members (b) Some of the staff members within that office are democratic party members (c) Two of the deputies within the other offices are justice party members (d) Two of the deputies within the other offices are conservative party members (e) Some of the staff members within the other offices are justice party members. 2. When the democratic party holds presidency, the staff of the prime minister's deputies are composed I. One-fourth of democratic party members II. One-half of justice party members and one-fourth of conservative party members III. One-half of conservative party members and one-fourth of justice party members. (a) I only (b) I and II only (c) II or III but not both (d) I and II or I and III (e) None of these 3. Which of the following is allowable under the rules as stated: (a) More than half of the staff within a given office belonging to a single party (b) Half of the staff within a given office belonging to a single party (c) Any person having a member of the same party as his or her immediate superior (d) Half the total number of staff members in all three offices belonging to a single party (e) Half the staff members in a given office belonging to parties different from the party of the top office holder in that office. 4. The office of the Army Chief passes from Conservative to Justice party. Which of the following must be fired. (a) The democratic deputy and all staff members belonging to Justice party (b) Justice party deputy and all his or hers staff members (c) Justice party deputy and half of his Conservative staff members in the chief of staff office (d) The Conservative deputy and all of his or her staff members belonging to Conservative party (e) No deputies and all staff members belonging to conservative parties.
Jim lies a lot. He tells the truth on only one day in a week. One day he said: "I lie on Mondays and Tuesdays." The next day he said: "Today is either Sunday, Saturday or Thursday." The next day he said: "I lie on Fridays and Wednesdays." On which day of the week does Jim tell the truth?
English 
