1
NDA 2018 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
The probabilities that a student will solve Question A and Question B are 0.4 and 0.5 respectively. What is the probability that he solves at least one of the two questions ?
A
0.6
B
0.7
C
0.8
D
0.9
2
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
$${5 \over {12}}$$
3
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)
4
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
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