**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**

- are parallel
- perpendicular
- intersect at one point
- none of the above

**Answer(2)**

**2.Which of the following is the root mean square deviation of a set of values is the**

- least about their mean
- maximum about their median
- minimum about their median
- minimum about their mode

**Answer(1)**

**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**

- 0.057
- 0.478
- 0.001
- 0.5

**Answer(1)**

**4. Runge-kutta formula of second order is**

- Taylor series formula
- Picard's formula
- Euler's modified formula
- None of the above

**Answer(3)**

**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**

- 7:9
- 3:5
- 5:8
- 7:8

**Answer(4)**

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