1
NDA Mathematics 4 September 2022
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language
Three fair dice are thrown. What is the probability of getting a total greater than or equal to 15 ?
A
$\frac{19}{216}$
B
$\frac{1}{12}$
C
$\frac{17}{216}$
D
$\frac{5}{54}$
2
NDA Mathematics 4 September 2022
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language
The probability that a person hits a target is 0.5. What is the probability of at least one hit in 4 shots ?
A
$\frac{1}{8}$
B
$\frac{1}{16}$
C
$\frac{15}{16}$
D
$\frac{7}{8}$
3
NDA Mathematics 4 September 2022
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language
A box contains 2 white balls, 3 black balls, and 4 red balls. What is the number of ways of drawing 3 balls from the box with at least one black ball?
A
84
B
72
C
64
D
48
4
NDA Mathematics 4 September 2022
MCQ (Single Correct Answer)
+2.5
-0.83
Change Language
During war, one ship out of 5 was sunk on an average in making a certain voyage. What is the probability that exactly 3 out of 5 ships would arrive safely?
A
$\frac{16}{625}$
B
$\frac{32}{625}$
C
$\frac{64}{625}$
D
$\frac{128}{625}$
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