Important Questions in Mathematics Paper -II & Paper -III for NET Exam

1.Consider graphs of the two linear equations ax + by = c and bx - ay = c, where a, b and c are all not equal to zero, if both
  1. are parallel
  2. perpendicular
  3. intersect at one point
  4. none of the above

2.Which of the following is the root mean square deviation of a set of values is the
  1. least about their mean
  2. maximum about their median
  3. minimum about their median
  4. minimum about their mode

3.The probability that an electronic device produced by a company does not function properly is equal to 0.1. If 10 devices are bought, then the probability, to the nearest thousandth, that 7 devices function properly is
  1. 0.057
  2. 0.478
  3. 0.001
  4. 0.5

4. Runge-kutta formula of second order is
  1. Taylor series formula
  2. Picard's formula
  3. Euler's modified formula
  4. None of the above

5.If the ratio between the present ages of Pallavi and Surbhi is 6:7. If Surbhi is 4 years old than Pallavi, what will be the ratio of the ages of Pallavi and Surbhi after 4 years
  1. 7:9
  2. 3:5
  3. 5:8
  4. 7:8