In a hotel, rooms are numbered from 101 to 550. A room is
chosen at random. What is the probability that room number
starts with 1, 2 or 3 and ends with 4, 5 or 6?

Answers were Sorted based on User's Feedback



In a hotel, rooms are numbered from 101 to 550. A room is chosen at random. What is the probabilit..

Answer / manpreet singh

Answer is 1/5(0.20)
Total rooms=550-101+1=450
Favourable rooms= 1z4(where z=0,1,2,3,4,5,6,7,8,9)=10
1z5(where z=0,1,2,3,4,5,6,7,8,9)=10
1z6(where z=0,1,2,3,4,5,6,7,8,9)=10
2z4(where z=0,1,2,3,4,5,6,7,8,9)=10
2z5(where z=0,1,2,3,4,5,6,7,8,9)=10
2z6(where z=0,1,2,3,4,5,6,7,8,9)=10
3z4(where z=0,1,2,3,4,5,6,7,8,9)=10
3z5(where z=0,1,2,3,4,5,6,7,8,9)=10
3z6(where z=0,1,2,3,4,5,6,7,8,9)=10
total favourable rooms=90
probability=90/450=1/5=0.20

Is This Answer Correct ?    11 Yes 2 No

In a hotel, rooms are numbered from 101 to 550. A room is chosen at random. What is the probabilit..

Answer / guest

There are total 450 rooms.

Out of which 299 room number starts with either 1, 2 or 3.
(as room number 100 is not there) Now out of those 299
rooms only 90 room numbers end with 4, 5 or 6

So the probability is 90/450 i.e. 1/5 or 0.20

Is This Answer Correct ?    9 Yes 2 No

Post New Answer

More Puzzles Interview Questions

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,


iwant to know which type of questions were coming in tcs company

3 Answers   TCS, Syntel,


1. There are six columns of coins and there are eight coins in each column. One of the columns is entirely of fake coins and other five columns contain real coins. Weight of one fake coin is 1 gm more than the real coin which is 50 gm. How you can tell which column contains fake coin by single weight? 2.You want to purchase a two wheeler. You got three options from the counter. 1) Pay Rs. 40,400 on single payment 2) Pay Rs. 20,000 now and remaining by two equal annual installment of Rs. 11,600 3) Pay Rs. 15,000 now and remaining by three equal annual installment of Rs. 10,000 Which option is most attractive? (Take annual interest rate 9%)

4 Answers  


day before yesterday i was 25 years , next year iam 28,when is my birthday? which day is today?

8 Answers  


You have 8 coins. 3 of them weigh x units, 3 y units, 1 a units and 1 b units. They are all mixed and look identical. You have to find the lightest coin in minimum number of weighing (balance)

1 Answers   Oracle,






All of the tickets for 2 music concerts, X and Y, were either purchased or given away, and the ratio of X tickets to Y was 2 to 1. Of the total number of X tickets and Y tickets, what percentage was purchased? 1) The total number of X tickets and Y tickets, is 240. 2) Of the X tickets, exactly 60% were purchased, and of the Y tickets, exactly 80% were purchased. a) if statement (1) ALONE is sufficient, but statement (2) alone is not sufficient to answer the question. b) if statement (2) ALONE is sufficient, but statement (1) alone is not sufficient to answer the question. c) if BOTH statements (1) and (2) TOGETHER are sufficient to answer the question asked, but NEITHER statement ALONE is sufficient. d) if EACH statement ALONE is sufficient to answer the question asked. e) if statements (1) and (2) TOGETHER are NOT sufficient to answer the question asked, and additional data specific to the problem are needed.

4 Answers   Microsoft,


When Alexander the Great attacked the forces of Porus, an Indian soldier was captured by the Greeks. He had displayed such bravery in battle, however, that the enemy offered to let him choose how he wanted to be killed. They told him, "If you tell a lie, you will put to the sword, and if you tell the truth you will be hanged." The soldier could make only one statement. He made that statement and went free. What did he say?

5 Answers   CTS,


There is puzzle with the word "CONSTANTINE" and exactly don't know the question if anybody knows the Q&A plz send it ahmed.basha.munna@gmail.com

0 Answers   India Infoline,


In a group of 25, 13 can speak Latin, 15 can speak French, and 6 don’t speak either. How many of these speak both Latin and French?

11 Answers   Tech Mahindra,


foot is related to man in the same way hoof is related to...........

0 Answers  


o,t,t,f,f,s,s,_,_ fill the remaining....and tell me on 9022881719

6 Answers  


Suppose five bales of hay are weighed two at a time in all possible ways. The weights in pounds are 110, 112, 113, 114, 115, 116, 117, 118, 120, and 121. How much does each bale weigh?

1 Answers  






Categories