1
NDA 2018 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Two integers x and y are chosen with replacement from the set [0, 1, 2, ........., 10]. The probability that | x $$-$$ y | > 5 is
A
$${6 \over {11}}$$
B
$${35 \over {121}}$$
C
$${30 \over {121}}$$
D
$${25 \over {121}}$$
2
NDA 2018 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Three dice having digits 1, 2, 3, 4, 5 and 6 on their faces are marked I, II, and III and rolled. Let x, y and z represent the number on die-I, die-II and die-III, respectively. What is the number of possible outcomes such that x > y > z ?
A
14
B
16
C
18
D
20
3
NDA 2018 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
In a binomial distribution, the mean is three times its variance. What is the probability of exactly 3 successes out of 5 trials ?
A
$${{80} \over {243}}$$
B
$${{40} \over {243}}$$
C
$${{20} \over {243}}$$
D
$${{10} \over {243}}$$
4
NDA 2018 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Consider the following statements

I. P($$\overline A $$ $$\cup$$ B) = P($$\overline A $$) + P(B) $$-$$ P($$\overline A $$ $$\cap$$ B)

II. P(A $$\cap$$ $$\overline B $$) = P(B) $$-$$ P(A $$\cap$$ B)

III. P(A $$\cap$$ B) = P(B) P(A / B)

Which of the above statements are correct?
A
I and II
B
I and III
C
II and III
D
I, II and III
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