In an examination, 70% students passed in Physics, 80% students passed in Chemistry, 75% students passed in Mathematics and 85% students passed in Biology, and x% students failed in all the four subjects. What is the minimum value of x ?
10
12
15
None of the above
For the system of linear equations 2x + 3y + 5z =9, 7x + 3y - 2z = 8 and 2x + 3y +
Under what condition does the above system of equations have infinitely many solutions ?
For the system of linear equations 2x + 3y + 5z =9, 7x + 3y - 2z = 8 and 2x + 3y +
Under what condition does the above system of equations have unique solution ?
has any real value and
What is the number of odd integers between 1000 and 9999 with no digit repeated ?
2100
2120
2240
None of the above
2x2 + 3x - = 0 has roots - 2 and while the equation x2 - 3mx + 2m2 = 0 has both roots positive, where a > 0 and > 0. What is the value of ?
1
2
4
2x2 + 3x - = 0 has roots - 2 and while the equation x2 - 3mx + 2m2 = 0 has both roots positive, where a > 0 and > 0.
1
2
4
6