probability aptitude questions - Wikitechy https://www.wikitechy.com/interview-questions/tag/probability-aptitude-questions/ Interview Questions Mon, 06 Sep 2021 06:42:30 +0000 en-US hourly 1 https://wordpress.org/?v=7.0 https://www.wikitechy.com/interview-questions/wp-content/uploads/2025/10/cropped-wikitechy-icon-32x32.png probability aptitude questions - Wikitechy https://www.wikitechy.com/interview-questions/tag/probability-aptitude-questions/ 32 32 The probability of drawing a red card from a deck of playing cards is ? https://www.wikitechy.com/interview-questions/probability/the-probability-of-drawing-a-red-card-from-a-deck-of-playing-cards-is/ https://www.wikitechy.com/interview-questions/probability/the-probability-of-drawing-a-red-card-from-a-deck-of-playing-cards-is/#respond Wed, 18 Aug 2021 02:03:23 +0000 https://www.wikitechy.com/interview-questions/?p=2048

The probability of drawing a red card from a deck of playing cards is ?

A. 2/18

B. 1/13

C. 1/4

D. 1/2

Answer : D. 1/2

Explanation:

Total number of cards n(S) = 52
Number of red cards n(E) = 26.
Hence, P(E) = n(E) / n(S)
= 26/52
= 1/2.

]]> https://www.wikitechy.com/interview-questions/probability/the-probability-of-drawing-a-red-card-from-a-deck-of-playing-cards-is/feed/ 0 If the probability that A will live 15 year is 7/8 and that B will live 15 year is 9/10, then what is the probability that both will live after 15 year ? https://www.wikitechy.com/interview-questions/probability/if-the-probability-that-a-will-live-15-year-is-7-8-and-that-b-will-live-15-year-is-9-10-then-what-is-the-probability-that-both-will-live-after-15-year/ https://www.wikitechy.com/interview-questions/probability/if-the-probability-that-a-will-live-15-year-is-7-8-and-that-b-will-live-15-year-is-9-10-then-what-is-the-probability-that-both-will-live-after-15-year/#respond Wed, 18 Aug 2021 02:01:31 +0000 https://www.wikitechy.com/interview-questions/?p=2047

If the probability that A will live 15 year is 7/8 and that B will live 15 year is 910, then what is the probability that both will live after 15 year ?

A. 1/20

B. 63/80

C. 1/5

D. None of these

Answer : B. 63/80

Explanation:

P(A) = 7/8, P(B) = 9/10
Required Probability = P(A) x P(B)
= (7/8) x (9/10)
= 63/80.

]]> https://www.wikitechy.com/interview-questions/probability/if-the-probability-that-a-will-live-15-year-is-7-8-and-that-b-will-live-15-year-is-9-10-then-what-is-the-probability-that-both-will-live-after-15-year/feed/ 0 Two dice are rolled together. What is the probability of getting two numbers whose product is even ? https://www.wikitechy.com/interview-questions/probability/two-dice-are-rolled-together-what-is-the-probability-of-getting-two-numbers-whose-product-is-even/ https://www.wikitechy.com/interview-questions/probability/two-dice-are-rolled-together-what-is-the-probability-of-getting-two-numbers-whose-product-is-even/#respond Wed, 18 Aug 2021 01:41:27 +0000 https://www.wikitechy.com/interview-questions/?p=2028

Two dice are rolled together. What is the probability of getting two numbers whose product is even ?

A. 17/36

B. 1/3

C. 3/4

D. 11/25

Answer : C. 3/4

Explanation:

Total number of outcomes possible when a die is rolled = 6 (∵ any one face out of the 6 faces).
Hence, Total number of outcomes possible when two dice are rolled, n(S) = 6 × 6 = 36.
Let E = the event of getting two numbers whose product is even.
= {(1,2), (1,4), (1,6), (2,1), (2,2), (2,3), (2,4), (2,5), (2,6), (3,2), (3,4), (3,6), (4,1), (4,2), (4,3), (4,4), (4,5), (4,6), (5,2),(5,4), (5,6), (6,1), (6,2), (6,3), (6,4), (6,5), (6,6)}

Hence, n(E) = 27
P(E) = n(E) / n(S)
= 27/36
= 3/4

]]> https://www.wikitechy.com/interview-questions/probability/two-dice-are-rolled-together-what-is-the-probability-of-getting-two-numbers-whose-product-is-even/feed/ 0 A letter is chosen at random from the word ‘ASSASSINATION’. What is the probability that it is a consonant ? https://www.wikitechy.com/interview-questions/probability/a-letter-is-chosen-at-random-from-the-word-assassination-what-is-the-probability-that-it-is-a-consonant/ https://www.wikitechy.com/interview-questions/probability/a-letter-is-chosen-at-random-from-the-word-assassination-what-is-the-probability-that-it-is-a-consonant/#respond Wed, 18 Aug 2021 01:39:18 +0000 https://www.wikitechy.com/interview-questions/?p=2027

A letter is chosen at random from the word “ASSASSINATION”. What is the probability that it is a consonant ?

A. 4/13

B. 8/13

C. 7/13

D. 6/13

Answer : C. 7/13

Explanation:

Total Number of letters in the word ASSASSINATION, n(S) = 13
Total number of consonants in the word ASSASSINATION = 7 (i.e., {S, S, S, S, N, T, N }
P(consonant) = 7/13

]]> https://www.wikitechy.com/interview-questions/probability/a-letter-is-chosen-at-random-from-the-word-assassination-what-is-the-probability-that-it-is-a-consonant/feed/ 0