Ques:- The average age of 12 students is 20 years. If the age of one more student is included, the average decreases by 1. What is the age of the new student?
A. 5 years
B. 6 years
C. 7 years
D. 9 years
Recent Answer : Added by DK On 2022-03-09 16:28:54:
Correct option is C)
Let be students are consider as child
Let the age of child added later be x years.
average age of 12 children =20 years
∴ Total age of 12 children =20×12=240 years
After one more child is added-
Average of 13 children =20−1=19 years
Average age of 13 children =
13
sum of 12 children+x
19=
13
240+x
⇒240+x=247
⇒x=247−240=7 years
Hence the age of child added later is 7 years.
Ques:- Describe your work ethic.
Ques:- A, B and C rent a pasture. A puts 10 oxen for 7 months, B puts 12 oxen for 5 months and C puts 15 oxen for 3 months for grazing. If the rent of the pasture is Rs.175, how much must C pay as his share of rent?
A. Rs. 45
B. Rs. 50
C. Rs. 55
D. Rs. 60
Recent Answer : Added by MANOJ M On 2021-10-07 15:40:52:
45
Ques:- Find the missing number on the series 2, 3, 5, 7, 11, …., 17
Recent Answer : Added by shivangi sharma On 2022-08-14 16:42:27:
13 and 15
Ques:- Total 5 children,youngest 3yrs old and no 2 children hve the same age ,sum of their age is26.Find the age of eldest?
Recent Answer : Added by Admin On 2020-05-17 12:01:42:
8 is the answer
b’coz no two have the same age
8+6+5+4+3=26
Ques:- 324 : 400 ::576 : __
Recent Answer : Added by egspillay student On 2022-08-14 16:44:15:
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Ques:- Two men and three women working 7 hours a day finish a work in 5 days. Four men and four women working 3 hours a day complete the work in 7 days. The number of days in which only 7 men working 4 hours a day will finish the work is?
Recent Answer : Added by Amit On 2022-08-14 16:45:14:
5
Ques:- What is the significant achievement in your life
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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Ques:- A team of eight entered for a shooting competition. The best marks man scored 85 points. If he had scored 92 points, the average scores for. The team would have been 84. How many points altogether did the team score?
Recent Answer : Added by Pritam Das On 2022-03-09 16:33:22:
665
Ques:- How do you design a clock for blind people?
Recent Answer : Added by Elcin Kumar M On 2022-05-17 08:55:19:
I would design a voice integrated clock that reads out the time aloud whenever people ask for time
Ques:- Ram professes to sell his goods at the cost price but he made use of 900 grms instead of a kg, what is the gain percent?
Recent Answer : Added by DK BOSS On 2021-07-17 06:19:14:
Answer: C
Explanation:
900 — 100
100 — ? => 100/900*100 => 11.11%
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Ques:- Given a rectangular (cuboid for the puritans) cake with a rectangular piece removed (any size or orientation), how would you cut the remainder of the cake into two equal halves with one straight cut of a knife?
Recent Answer : Added by John Paul On 2021-05-06 12:41:09:
Cut it horizontally so both can have equal share and same in shape.
Ques:- There are 7 letters A,B,C,D,E,F,GAll are assigned some numbers from 1,2 to 7.B is in the middle if arranged as per the numbers.A is greater than G same as F is less than C.G comes earlier than E.1) Which is the fourth letter ? ( B / D / F/ E)2) what is the difference between A and F? ( 3 /4/ 5/ 6)3 Choose 4 consecutive letters? ( ABCD / BDFE / AEFB / NONE OF THESE )
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Ques:- A train travelling at a speed of 90 km/hr, crosses a pole in 10 seconds. The length of the train is
A. 100 m
B. 150 m
C. 250 m
D. 900 m
Recent Answer : Added by vineet kumar On 2022-08-14 16:44:48:
Train speed 90 km /h
1st we have to change in m/s. then 90*5/18=25m/s
Then d=speed*time
=25*10=250m train length
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Recent Answer : Added by Raja babu On 2022-09-16 14:51:58:
21
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Ques:- The following question asked at Infosys campus recruitment held at Pragathi. If 1>= y > x and xy=z.which of the following is not true? i)z>0 ii)x=z iii)y=z iv)z>y
Recent Answer : Added by Admin On 2020-05-17 12:01:07:
1>=y>x => y belongs to (-infinity,1]
x belongs to (-infinity,y)
if both x and y are negitive z can be greater than zero and
can be greater than y(1 and 4 are true)
if y equals 1 then x can be equal to z(2 is true)
therefore y=z is not true for any value of x and y
Correct option is C)
Let be students are consider as child
Let the age of child added later be x years.
average age of 12 children =20 years
∴ Total age of 12 children =20×12=240 years
After one more child is added-
Average of 13 children =20−1=19 years
Average age of 13 children =
13
sum of 12 children+x
19=
13
240+x
⇒240+x=247
⇒x=247−240=7 years
Hence the age of child added later is 7 years.