pl solve ths 3 problems asap.
thanks
please solve ths 3 problems
This topic has expert replies
-
- Junior | Next Rank: 30 Posts
- Posts: 28
- Joined: Mon Nov 17, 2008 4:40 am
-
- Junior | Next Rank: 30 Posts
- Posts: 17
- Joined: Mon Nov 24, 2008 7:06 am
Soln to 1st question:
Let the no. of male student is x and female student be y, thus total no of student is = x+y
Ques gives information that 72% of X and 80 % of Y applied for the college and asks what is x/x+y
Statement 1:
indicates that x+y =840, therefore x/x+y = x/840 we cannot answer the question as X is unknown.
Statement 2:
Indicates that: 75% of x+y applied for the college thus-
72% of X and 80 % of Y = 75% of x+y
72/100 * X + 80/100*y = 75/100 (x+y)
from this we can get x in terms of y and thus we can calculate x/x+y
So statement 2 is enough to solve the problem.
Let the no. of male student is x and female student be y, thus total no of student is = x+y
Ques gives information that 72% of X and 80 % of Y applied for the college and asks what is x/x+y
Statement 1:
indicates that x+y =840, therefore x/x+y = x/840 we cannot answer the question as X is unknown.
Statement 2:
Indicates that: 75% of x+y applied for the college thus-
72% of X and 80 % of Y = 75% of x+y
72/100 * X + 80/100*y = 75/100 (x+y)
from this we can get x in terms of y and thus we can calculate x/x+y
So statement 2 is enough to solve the problem.
-
- Junior | Next Rank: 30 Posts
- Posts: 17
- Joined: Mon Nov 24, 2008 7:06 am
Solution to second prob:
Question ask are x and y both +ve
Statement 1:
2x -2y = 1 or x-y =1/2
Hence x and y can both be positive and negative
x = 1 and y = 1/2
x = 1/2 and y =-1
not sufficient
Statement 2:
x/y> 1 also implies x>y, please note here x or y cannot be zero as their ratio is greater than 1
x can be +ve as well as -ve, so not sufficient
By combining both the statement:
x-y =1/2 and x>y and x is non 0
x and y must be +ve to satisfy x-y=1/2 equation.
So both statement togther can answer the question.
Question ask are x and y both +ve
Statement 1:
2x -2y = 1 or x-y =1/2
Hence x and y can both be positive and negative
x = 1 and y = 1/2
x = 1/2 and y =-1
not sufficient
Statement 2:
x/y> 1 also implies x>y, please note here x or y cannot be zero as their ratio is greater than 1
x can be +ve as well as -ve, so not sufficient
By combining both the statement:
x-y =1/2 and x>y and x is non 0
x and y must be +ve to satisfy x-y=1/2 equation.
So both statement togther can answer the question.