1
NDA 2018 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Two fair dice are rolled. What is the probability of getting a sum of 7 ?
A
$${1 \over {36}}$$
B
$${1 \over {6}}$$
C
$${7 \over {12}}$$
D
$${5 \over {12}}$$
2
NDA 2018 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
If A and B are two events such that 2P(A) = 3P(B), where 0 < P(A) < P(B) < 1, then which one of the following is correct?
A
P(A | B) < P(B | A) < P(A $$\cap$$ B)
B
P(A $$\cap$$ B) < P(B | A) < P(A | B)
C
P(B | A) < P(A | B) < P(A $$\cap$$ B)
D
P(A $$\cap$$ B) < P(A | B) < P(B | A)
3
NDA 2018 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
A box has ten chits numbered 0, 1, 2, 3, ......., 9. First, one chit is drawn at random and kept aside. From the remaining, a second chit is drawn at random. What is the probability that the second chit drawn is "9" ?
A
$${1 \over {10}}$$
B
$${1 \over {9}}$$
C
$${1 \over {90}}$$
D
None of these
4
NDA 2018 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
One bag contains 3 white and 2 black balls, another bag contains 5 white and 3 black balls. If a bag is chosen at random and a ball is drawn from it, what is the chance that it is white?
A
$${3 \over 8}$$
B
$${49 \over 80}$$
C
$${8 \over 13}$$
D
$${1 \over 2}$$
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