alleryStart learning →Standard deviation of {2, 4, 6, 8, 10}:
- 2
- 2.83
- 4
- 8
Show answer and solution
Correct answer: B. 2.83
sigma = sqrt(variance) = sqrt(8) ≈ 2.828.
Indian Navy Pilot Probability — practice questions
Explore 35 free Probability questions in Indian Navy Pilot Mathematics. Open each question or exercise to read its content, reference answers and available explanation.
Practise Probability with Quill →Probability questions and exercises with answers
Showing questions 1–30 of 35.
Standard deviation of {2, 4, 6, 8, 10}:Read the answer and worked solution →Binomial distribution: P(X = k) for n trials, success probability p:Read the answer and worked solution →The probability of getting an even number on a single throw of a die is:Read the answer and worked solution →The probability of drawing a red card from a well-shuffled deck of 52 cards is:Read the answer and worked solution →Two dice are rolled. What is the probability of getting a sum of 8?Read the answer and worked solution →A card is drawn from a deck. What is the probability of getting a heart or a king?Read the answer and worked solution →Two dice are rolled. The probability of getting AT LEAST ONE SIX is:Read the answer and worked solution →Complete the definition of conditional probabilityRead the answer and worked solution →True or false: conditional probabilityRead the answer and worked solution →Independent or mutually exclusive?Read the answer and worked solution →Match each rule to its nameRead the answer and worked solution →IndependenceRead the answer and worked solution →Order the steps for a Bayes' theorem questionRead the answer and worked solution →Complete the conditions for a partitionRead the answer and worked solution →True or false: independence versus exclusivityRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Tap every statement that follows from independenceRead the answer and worked solution →The multiplication ruleRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Complete the theorem of total probabilityRead the answer and worked solution →Which theorem answers which question?Read the answer and worked solution →True or false: total probability and BayesRead the answer and worked solution →Match each historical figure to their contributionRead the answer and worked solution →The Historical NoteRead the answer and worked solution →Flip and pair: notation with meaningRead the answer and worked solution →Order the reasoning: from a partition to a posteriorRead the answer and worked solution →Tap every quantity that is a probabilityRead the answer and worked solution →Spot the odd one outRead the answer and worked solution →
Worked practice questions
Binomial distribution: P(X = k) for n trials, success probability p:
- n × p
- p^k × (1-p)^(n-k)
- C(n,k) × p^k × (1-p)^(n-k)
- n^k × p
Show answer and solution
Correct answer: C. C(n,k) × p^k × (1-p)^(n-k)
**Binomial:** P(X = k) = C(n, k) × p^k × (1-p)^(n-k).
For n coin flips, prob of exactly k heads with p = 0.5 success rate.
The probability of getting an even number on a single throw of a die is:
- $\tfrac23$
- $\tfrac12$
- $\tfrac16$
- $\tfrac13$
Show answer and solution
Correct answer: B. $\tfrac12$
Even numbers on a die are {2,4,6}: 3 of 6 outcomes ⟹ 3/6 = 1/2.
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