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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