NDA Mathematics 4 September 2022 | NDA Year Wise Previous Years Questions

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NDA Mathematics 4 September 2022

MCQ (Single Correct Answer)

+2.5

-0.83

Three fair dice are thrown. What is the probability of getting a total greater than or equal to 15 ?

$\frac{19}{216}$

$\frac{1}{12}$

$\frac{17}{216}$

$\frac{5}{54}$

NDA Mathematics 4 September 2022

MCQ (Single Correct Answer)

+2.5

-0.83

The probability that a person hits a target is 0.5. What is the probability of at least one hit in 4 shots ?

$\frac{1}{8}$

$\frac{1}{16}$

$\frac{15}{16}$

$\frac{7}{8}$

NDA Mathematics 4 September 2022

MCQ (Single Correct Answer)

+2.5

-0.83

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?

NDA Mathematics 4 September 2022

MCQ (Single Correct Answer)

+2.5

-0.83

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?

$\frac{16}{625}$

$\frac{32}{625}$

$\frac{64}{625}$

$\frac{128}{625}$

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