Ques:- 10 books are placed at random in a shelf. The probability that a pair of books will always be together is -.
Ques:- A positive number when decreased by 2 is equal to 15 times the reciprocal of the number. What is the number ?
Recent Answer : :
Let the number be x.
So x-2 =15/x, or
x^2–2x-15=0, or
(x-5)(x+3)=0
Hence x = 5 or -3.
Check: When x=5, 5–2=3 which is 15/5=3.
When x=-3, -3–2=-5 which is 15/-3=-5.
The number is 5 or -3.
Ques:- On Monday a banker processed a batch of cheques, on Tuesday she processed three times as many, and on Wednesday she processed 4000 cheques. In the three days, she processed 16000 cheques. How many did she process on Tuesday?
Recent Answer : :
Monday =y cheques
Tuesday =3y cheques
wednesday=4000 cheques
totaling to 16000 cheques
therefore y+3y+4000=16000 cheques
4y+4000=16000 cheques therefore 4y=16000-4000 cheques= 4y=12000cheques
therefore y=12000/4=3000 cheques
monday=3000 cheques
tuesday=3×3000=9000cheques
Ques:- The banker’s gain of a certain sum due 2 years hence at 10% per annum is Rs. 24 the present worth is?
Recent Answer : :
General formula for simple interest is SI=PTR/100
Then P= SI x 100 / TR
Here SI= rs.24, T= 2 years, R = 10%
P= 24 x 100 / 2 x 10 = 120 Rs
Answer : Rs. 120
Ques:- The Pravasi Bhartiya Diwas 2009 was held in which city?
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Ques:- The average of the marks of 12 students in a class is 36. If the marks of each student are doubled, find the new average?
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Ques:- 78 x 14 + 7645 ? ? = 8247
A. 580
B. 590
C. 490
D. 480
E. None of these
Recent Answer : :
c
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Ques:- A train travelled from station P to Q in 8 hours and came back from station Q to P is 6 hours. What would be the ratio of the speed of the train while traveling from station P to Q to that from station Q to P?
Recent Answer : :
Ratio: 3/4
Ques:- Given N students, find the number of ways the students could be ranked. Also one or more students can have ties and can have the same ranks.
Ques:- What was your work profile in your last company? What was the reason for leaving your last company? What are your future plans?
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Ques:- About my self and family
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Ques:- 15 men take 21 days of 8 hrs. each to do a piece of work. How many days of 6 hrs. each would it take for 21 women if 3 women do as much work as 2 men?(a) 30(b) 20(c) 19(d) 29
Recent Answer : :
30
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Ques:- You are a bug sitting in one corner of a cubic room. You wish to walk (no flying) to the extreme opposite corner (the one farthest from you). Describe the shortest path that you can walk?
Ques:- Asked about my education.
Ques:- P and Q started a business with respective investments of Rs. 4 lakhs and Rs. 10 lakhs. As P runs the business, his salary is Rs. 5000 per month. If they earned a profit of Rs. 2 lakhs at the end of the year, then find the ratio of their earnings?
Ques:- Tell me about a time when you had too many things to doand you were requiredto prioritize your tasks.
Ques:- Express a speed of 36 kmph in meters per second?
Recent Answer : :
s=36kmph
in meter per second is=36*5/18=>10
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All books can be arranged in 10! ways. A single pair of books can be taken as a unit and arranged among the 8 others in 9! ways. The pair of books can also be interchanged and therefore rearranged in 2! ways. Thus the probability of the pair always being together is (9!*2!)/10!