alleryStart learning →A card is drawn from a well shuffled 52-card deck. P(a diamond) is
- 1/4
- 1/52
- 1/13
- 1/2
Show answer and solution
Correct answer: A. 1/4
A deck holds 13 diamonds among 52 cards, so the chance is 13/52 = 1/4.
CBSE Class 11 (Commerce) Probability — practice questions — page 2
Explore 44 free Probability questions in CBSE Class 11 (Commerce) 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 31–44 of 44.
A card is drawn from a well shuffled 52-card deck. P(a diamond) isRead the answer and worked solution →If a card is a diamond with probability 1/4, P(not a diamond) isRead the answer and worked solution →If P(A) = 0.35, then the probability of 'not A' isRead the answer and worked solution →If P(A) = 0.4, P(B) = 0.5 and P(A and B) = 0.2, then P(A or B) isRead the answer and worked solution →For mutually exclusive A and B, P(A) = 0.3 and P(B) = 0.45. P(A or B) isRead the answer and worked solution →If P(A) = 0.5, P(B) = 0.6 and P(A or B) = 0.8, then P(A and B) isRead the answer and worked solution →In P(A) + P(B), the sample points of A and B together are countedRead the answer and worked solution →A fair die is rolled. P(a number less than 3) isRead the answer and worked solution →Two fair coins are tossed. P(exactly one head) isRead the answer and worked solution →Two fair dice are thrown. P(sum greater than 11) isRead the answer and worked solution →A card is drawn from ten cards numbered 1 to 10. P(2, 4, 6 or 8) isRead the answer and worked solution →Two dice are thrown. P(first die is 6 and sum is at least 11) isRead the answer and worked solution →A bag has 5 red, 3 green and 2 yellow marbles. P(red or yellow) isRead the answer and worked solution →If P(A) = 0.6 and P(B) = 0.7, the smallest possible P(A and B) isRead the answer and worked solution →
Worked practice questions
If a card is a diamond with probability 1/4, P(not a diamond) is
- 12/13
- 1/3
- 3/4
- 1/4
Show answer and solution
Correct answer: C. 3/4
An event and its complement have probabilities summing to 1, so 1 - 1/4 = 3/4.
If P(A) = 0.35, then the probability of 'not A' is
- 0.75
- 0.45
- 0.35
- 0.65
Show answer and solution
Correct answer: D. 0.65
A and not A together make S, so P(not A) = 1 - 0.35 = 0.65.
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