1
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Three digits are chosen at random from 1, 2, 3, 4, 5, 6, 7, 8 and 9 without repeating any digit. What is the probability that the product is odd?
A
$${2 \over 3}$$
B
$${7 \over {48}}$$
C
$${5 \over {42}}$$
D
$${5 \over {108}}$$
2
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Two events A and B are such that P (not B) = 0.8, P (A $$\cup$$ B) = 0.5 and P (A / B) = 0.4. Then, P(A) is equal to
A
0.28
B
0.32
C
0.38
D
None of these
3
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
If mean and variance of a binomial variate X are 2 and 1 respectively, then the probability that X takes a value greater than 1, is
A
$${2 \over 3}$$
B
$${4 \over 5}$$
C
$${7 \over 8}$$
D
$${11 \over 16}$$
4
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
Seven unbiased coins are tossed 128 times. In how many throws would you find at least three heads?
A
99
B
102
C
103
D
104
EXAM MAP
Medical
NEETAIIMS
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
Defence
NDA
Staff Selection Commission
SSC CGL Tier I
CBSE
Class 12