1
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
In eight throws of a die, 5 or 6 is considered a success. The mean and standard deviation of total number of successes is respectively given by
A
$${8 \over 3},{{16} \over 9}$$
B
$${8 \over 3},{4 \over 3}$$
C
$${4 \over 3},{4 \over 3}$$
D
$${4 \over 3},{{16} \over 9}$$
2
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
A and B are two events such that $$\overline A $$ and $$\overline B $$ are mutually exclusive. If P(A) = 0.5 and P(B) = 0.6, then what is the value of P(A / B) ?
A
$${1 \over 5}$$
B
$${1 \over 6}$$
C
$${2 \over 5}$$
D
$${1 \over 3}$$
3
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
What is the probability that an interior point in a circle is closer to the centre than to the circumference ?
A
$${1 \over 4}$$
B
$${1 \over 2}$$
C
$${3 \over 4}$$
D
It cannot be determined
4
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
If A and B are two events, then what is the probability of occurrence of either event A or event B ?
A
P(A) + P(B)
B
P(A $$\cup$$ B)
C
P(A $$\cap$$ B)
D
P(A) P(B)
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