Ques:- There are 4 people in a closed room and you are waiting outside to enter into the room. You can enter only when one of them opens the door. The probability that somebody will open the door is 1/2. Now what is the probability that the door will be opened so that you can go inside?
Recent Answer : Added by Ashwin GB On 2021-07-08 16:28:54:
The probability that no one opens the door would be
0.5×0.5×0.5×0.5= 0.0625
So, the probability that atleast one opens the door is 1-0.0625= 0.9375
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Ques:- Find out the wrong number in the series: 190, 166, 145, 128, 112, 100, 91
A. 100
B. 112
C. 128
D. 166
Recent Answer : Added by trace On 2022-01-16 17:19:50:
128 is incorrect. There is a difference of multiples of 3 in the number pattern, which starts at 24 and reduces by 3 each time. Therefore the correct pattern would read 190, 166, 145, 127, 112, 100, 91.
this would leave the pattern with differences in the pattern 24, 21, 18, 15, 12, 9. The next number in the pattern would be 6 lower than 91. 91 – 6 = 85. Then 85 -3 – 82, followed by 82 – 0 = 82. After this, if -3 were taken the pattern would start to rise so 82 – – 3 = 85.
Ques:- When you receive positive feedback about the completion of a project do you give your team any credit?
Ques:- A garrison of 3300 men has provisions for 32 days, when given at a rate of 850 grams per head. At the end of 7 days a reinforcement arrives and it was found that now the provisions will last 8 days less, when given at the rate of 825 grams per head. How, many more men can it feed?
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Ques:- A large tanker can be filled by two pipes A and B in 60 and 40 minutes respectively. How many minutes will it take to fill the tanker from empty state if B is used for half the time and A and B fill it together for the other half?
Recent Answer : Added by Raja On 2022-11-15 16:37:18:
30mins
Let the total time taken to fill the tank be x minutes.
Then, work done by B in half hour + work done by (A+B) in half hour =1.
(
40
1
×
2
x
)+(
60
1
+
40
1
)×
2
x
=1
⇒
80
x
+
48
x
=1
⇒
240
3x+5x
=1
⇒8x=240
⇒x=30 min
Ques:- A student divided a number by 2/3 when he required to multiply by 3/2. Calculate the percentage of error in his result.
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Ques:- Find out the wrong number in the series: 40960, 10240, 2560, 640, 200, 40, 10
A. 40
B. 200
C. 640
D. 2560
Recent Answer : Added by Mahendra Sharma On 2022-08-14 16:41:55:
200
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Ques:- In a Park, N persons stand on the circumference of a circle at distinct points. Each possible pair of persons, not standing next to each other, sings a two-minute song ? one pair immediately after the other. If the total time taken for singing is 28 minutes, what is N?
Recent Answer : Added by Admin On 2022-09-29 18:42:28:
Total number of pairs is NC2^{N}C_2NC2. Number of pairs standing next to each other = N. Therefore, number of pairs in question = NC2^{N}C_2NC2 – N = 28/2 = 14. If N = 7,
7C2 – 7 = 21 – 7 = 14….
N =7
Ques:- A car covers a distance of 624 km in 6 ½ hours. Evaluate its speed?
Recent Answer : Added by BRIAN On 2021-10-07 15:41:45:
S=D/T
S=624KM/6.5HRS
S=96KM/HR
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Ques:- how many two digit numbers satisfy the property:the last digit of the sqr of the two digit number is 8
Recent Answer : Added by Admin On 2020-05-17 11:59:45:
ans: none
let it may be any number the square cant end in 8
Ques:- If x + 8y = 20 and x = -3y, then y =
Recent Answer : Added by David Evans Gyamfi On 2021-09-26 15:12:42:
x+8y=20, x=-3y
(-3y)+8y=20
5y=20
y=4
The answer for y is 4
Ques:- Two people X & Y walk on the wall of a godown in opposite direction. They meet at a point on one side and then go ahead. X after walking for some time, walks in opposite direction for 15 mtrs.Then again he turns back and walks in the original direction. What distance did Y walk before they met again, if X walks 11 mtrs by the time Y walks
Recent Answer : Added by Admin On 2020-05-17 11:59:43:
i Guess 8 mtrs.
Ques:- There is a whole number n for which the following holds: if you put a 4 at the end of n, and multiply the number you get in that way by 4, the result is equal to the number you get if you put a 4 in front of n. In other words, we are looking for the number you can put on the dots in the following equation: 4… = 4 ?…4 Which number must be put on the dots to get a correct equation?
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The probability that no one opens the door would be
0.5×0.5×0.5×0.5= 0.0625
So, the probability that atleast one opens the door is 1-0.0625= 0.9375