1
GATE IN 2009
MCQ (Single Correct Answer)
+1
-0.3
A sphere of unit radius is centered at the origin. The unit normal at a point $$(x, y, z)$$ on the surface of the sphere is the vector.
A
$$(x, y, z)$$
B
$$\left( {{1 \over {\sqrt 3 }},{1 \over {\sqrt 3 }},{1 \over {\sqrt 3 }}} \right)$$
C
$$\left( {{x \over {\sqrt 3 }},{y \over {\sqrt 3 }},{z \over {\sqrt 3 }}} \right)$$
D
$$\left( {{x \over {\sqrt 2 }},{y \over {\sqrt 2 }},{z \over {\sqrt 2 }}} \right)$$
2
GATE IN 2009
MCQ (Single Correct Answer)
+1
-0.3
A screening test is carried out to detect a certain disease. It is found that $$12$$% of the positive reports and $$15$$% of the negative reports are incorrect. Assuming that the probability of a person getting positive reports is $$0.01,$$ the probability that a person tested gets an incorrect reports is
A
$$0.0027$$
B
$$0.0173$$
C
$$0.1497$$
D
$$0.2100$$
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