NDA Mathematics 1st September 2024 | Probability Question 105 | Mathematics

The occurrence of a disease in an industry is such that the workers have 20% chance of suffering from it. What is the probability that out of 6 workers chosen at random, 4 or more will suffer from the disease?

53/3125

63/3125

73/3125

83/3125

NDA Mathematics 1st September 2024

MCQ (Single Correct Answer)

+2.5

-0.833

Three perfect dice are rolled. Under the condition that no two show the same face, what is the probability that one of the faces shown is an ace (one)?

5/9

2/3

1/3

1/2

NDA Mathematics 1st September 2024

MCQ (Single Correct Answer)

+2.5

-0.833

In a binomial distribution, if the mean is 6 and the standard deviation is √2, then what are the values of the parameters n and p respectively?

18 and 1/3

9 and 1/3

18 and 2/3

9 and 2/3

NDA Mathematics 21 April 2024

MCQ (Single Correct Answer)

+2.5

-0.83

A bag contains 5 black and 4 white balls. A man selects two balls at random. What is the probability that both of these are of the same colour?

$\frac{1}{6}$

$\frac{5}{108}$

$\frac{4}{9}$

$\frac{5}{18}$

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