Ques:- The average mark of the students of a class in a particular exam is 80. If 5 students whose average mark in that exam is 40 are excluded, the average mark of the remaining will be 90. Find the number of students who wrote the exam?
Recent Answer : Added by Angel Maluleka On 2022-05-17 09:07:28:
-Total /n=80
– x/5=40
x=200
Total/n=y/n
y-x/n-5=90
80n-200=90(n-5)
80n-200=90n-450
450-200=10n
n =25 (students) write exam
Ques:- 9 balls are there one of them is of higher wt and remaining all are of same. given is one weighing scale and you can use it two times. How will you find the heavy ball in two trials only.
Recent Answer : Added by venkatesh On 2021-08-12 06:28:25:
Balls- B1, B2, B3, B4, B5, B6, B7, B8, B9.
Group1 – (B1, B2, B3), Group2 – (B4, B5, B6), Group3 – (B7, B8, B9)
Now weigh any two groups. Group1 on left side of the scale and Group2 on the right side.
When weighing scale tilts left – Group1 has a heavy ball or right – Group2 has a heavy ball or balanced – Group3 has a heavy ball.
Lets assume Group 1 has a heavy ball.
Now weigh any two balls from Group1. B1 on left side of the scale and B2 on right side.
When weighing scale tilts left – B1 is the heavy or tilts right – B2 is the heavy or balanced – B3 is the heavy.
Ques:- The least number which when divided by 16, 18 and 21, leave the remainder 3, 5 and 8 respectively is:
Recent Answer : Added by Gopi Krishna On 2022-08-14 16:28:41:
995
Ques:- Tell me something about your family?
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Ques:- How many years of working experience you have as computer operator?
Recent Answer : Added by kallanath On 2021-11-24 16:45:05:
2years
Ques:- The average of first 10 odd numbers is?
Recent Answer : Added by nani Reddy On 2021-08-05 17:11:28:
first 10 odd num are 1,3,5,7,9,11,13,15,17,19
sum=100
avg=100/10
avg of 10 odd num =10
Ques:- When can you join our company?
Recent Answer : Added by DK BOSS On 2021-07-30 16:29:54:
I can join your company with in one month that is my notice period time
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Ques:- If A lends Rs.3500 to B at 10% per annum and B lends the same sum to C at 11.5% per annum then the gain of B in a period of 3 years is?
Recent Answer : Added by LYNETTE On 2021-11-09 15:53:46:
3500*10/100
3500*11.5/100 = 402.5 per year
402.5×3 = R1207.5
Ques:- Why you choose teaching as a profession?
Ques:- Which number should come next in the series? 1 – 1 – 2 – 3 – 5 – 8 – 13?
Recent Answer : Added by Raja babu On 2022-09-16 14:51:58:
21
Ques:- A traveler walks a certain distance. Had he gone half a kilometer an hour faster , he would have walked it in 4/5 of the time, and had he gone half a Kilometer an hour slower, he would have walked 2 ½ hr longer. What is the distance?
Recent Answer : Added by Nitesh On 2021-05-28 08:49:20:
d / (x+1/2) = 4/5 * t
and d / (x-1/2) = 5/2 + t
solving we get d = 15.
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Ques:- Mr. Shah decided to walk down the escalator of a tube station. He found that if he walks down 26 steps, he requires 30 seconds to reach the bottom. However, if he steps down 34 stairs he would only require 18 seconds to get to the bottom. If the time is measured fromthe moment the top step begins to descend to the time he steps off the last step at the bottom, find out the height of the stair way in steps?
Recent Answer : Added by Palash Kose On 2021-12-04 15:02:28:
46
Ques:- Two pipes X and Y can separately fill a cistern in 18 and 24 hours respectively. If they are turned on alternately for one hour each, how long will it take to fill the cistern?
Recent Answer : Added by Admin On 2022-09-28 17:08:06:
X filling rate is 1/18 or 4/72 per hour
Y filling rate is 1/24 or 3/72 per hour
Combined as a pair it’s 7/72 in a complete 2 hour alternating sequence
72+ 7/72 =10 sequences = 70/72 on 20 hours, The outstanding balance is just 2/72
So at 20.5 hours with X turn filling is 100% complete with 72/72
Answer: It will take 20.5 hours to completely fill this tank.
Analysis of measured filling process, from X = 42/72 share & from Y = 30/72 share
Ques:- B – 1, B – 2 and B – 3 are three buses that travel from Mumbai to Delhi. Each bus starts at a different time and arrives at a different time. The digit in the bus number and the order of their departure of arrival is not the same. The first bus to leave Mumbai is the third bus to reach Delhi. Which is the first bus to leave Mumbai?
Recent Answer : Added by DK BOSS On 2021-07-21 15:26:32:
B1
Ques:- A boat takes 90 minutes less to travel 36 miles downstream than to travel the same distance upstream. If the speed of the boat in still water is 10 mph, the speed of the stream is:
Recent Answer : Added by Sanjeevnaidu On 2022-09-02 17:04:42:
Let speed of stream be v mph
Then,
36/(10-v) = 1.5hr + 36/(10+v)
On solving, we get speed of stream as v = 2mph.
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-Total /n=80
– x/5=40
x=200
Total/n=y/n
y-x/n-5=90
80n-200=90(n-5)
80n-200=90n-450
450-200=10n
n =25 (students) write exam