NDA Mathematics 21 April 2024 | Probability Question 117 | Mathematics

An unbiased coin is tossed $n$ times. The probability of getting at least one tail is $p$ and the probability of at least two tails is $q$ and $p - q = \frac{5}{32}$.

What is the value of $n$?

NDA Mathematics 21 April 2024

MCQ (Single Correct Answer)

+2.5

-0.83

Consider the following for the next two (02) items that follow:

An unbiased coin is tossed $n$ times. The probability of getting at least one tail is $p$ and the probability of at least two tails is $q$ and $p - q = \frac{5}{32}$.

What is the value of $p + q$?

$\frac{57}{32}$

$\frac{53}{32}$

$\frac{51}{32}$

NDA Mathematics 3 September 2023

MCQ (Single Correct Answer)

+2.5

-0.83

Three dice are thrown. What is the probability of getting a sum which is a perfect square?

$\frac{17}{108}$

$\frac{5}{108}$

$\frac{19}{108} $

$\frac{23}{108}$

NDA Mathematics 3 September 2023

MCQ (Single Correct Answer)

+2.5

-0.83

A, B, C and D are mutually exclusive and exhaustive events.

If 2P(A) = 3P(B) = 4P(C) = 5P(D), then what is 77P(A) equal to ?

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