In the co-ordinate plane , what is the area common to the two regions defined as y >=2 /x/-6 and y
- 48
- 72
- 24
- 36
0 voters
If f(x) = cos(logx) , then f(x) * f(y) - 1/2 [f(x/y) + f(xy)] =
a) -1
b) 1/2
c) -2
d) 0
-@A
Three horses A,B,C are participating in a race .The odd against each of A,B and C winning the race are 2:1 ,3:1 and 4:1 respectively. Given that only one horse win the race, what are odds in favour of either A ,B and C winning race?
- 47:13
- 3:2
- 47:60
- 3;5
0 voters
In the expression y^2 + 2xy + 2x + my - 3 can be resolved into two rational factors , then 'm' must be...
a) Any +ve real number
b) Any -ve real number
c) -2
d) 3
-@A
A drawer hold 4 red and 4 blue hats.What is the prob of getting exactly 3 red or 3 blue hatswhen taking out 4 randomly out of the drawer and immediately returning every hat to the drawer before taking out the next?
Plz solve
If a^2 + b^2 + c^2 = 1 , then ab + bc + ca lies in the interval
a) [1/2 , 1]
b) [-1 , 2 ]
c) [1/2 , 1]
d) [-1 , 1/2]
-@A
The product of 1/2 * 3/4 * 5/6 * ... 15/16 is less than one of the following. The least of them is...
a) 1/rt17
b) 1/rt15
c) 1/rt7
d) 2/3
-@A
How many integers n are there such that √n +√(n+3417) is rational?
Consider a 3×3 square where each 1×1 square is filled with one of the integers 1,2,3 or 4. A square is called mystical if each row and column sum up to a multiple of 4. How many mystical squares are there?
------>Details and assumptions
Rotations and reflections of the square are considered distinct solutions.
Integers from 1 to n are written on a board. One number was randomly deleted and the resulting average became 602/17. What was the number that was deleted ?
What annual payment will discharge a debt of rs.580 in 5 years at rate 8%....can sum one tell me whether 580 is the principal or amount to be repaid
the outer dimensions of a closed wooden box are 10cm by 8 cm by 7 cm. Thickness of wood is 1 cm. find the total cost of wood required to make box if 1cm^3 of wood costs Rs,2
A plot of land in the form of a rectangle has a dimension 240m*180m. A drainlet 10 m wide is dug all around it(outer side) and the earth dug out is evenly spread over the plot increasing its surface level by 25 cm. find depth of the drainlet.
Q5
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find the no of 5 digit multiple of 4 whic can be frmed using digits 1 to 7 using eac digit at most 1nce.
last digit of 17^15^13........^1 is
- 7
- 1
- 3
- 9
0 voters
A student is allowed to select at most n books from a collection of (2n+1) books.If total number of ways in which he can select at least one book is 63.Find the value of n.
a)4
b)3
c)5
d)6
Please let me know the steps to obtain the solution.
A question paper consists of two sections A and B having respectively 3 and 4 questions.Four questions are to be solved to qualify in that paper.One question from section A and 2 questions from section B are compulsory.In how many ways can a candidate select the questions to qualify in that paper
- 60
- 30
- 18
- 48
0 voters
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2^2+22^2+222^2+2222^2+22222^2+...........2.......48 times^2 divided by 9 leaves a remainder??