Correct option is B
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Question
A coin is tossed successively three times. Find the Probability (P), Event (E), Sample space (S) of getting exactly one head or two heads, where n is number of occurrences.
A. n(S) = 8 and n(E) = 4
B. n(E) = 6 and n(S) = 8
C. P(E) = 3 / 4
D. P(E) = 1 / 2
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- 2)In a pack of 42 cards, 3 cards are chosen one after the other. Find the number of ways this can be done without replacement:
- 3)Let us assume a person climbing the stairs can take one stair or two stairs at a time. How many ways can this person climb a flight of eight stairs?
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- 5)There are three boxes. First box has 2 white, 3 black and 4 red balls. Second box has 3 white, 2 black and 2 red balls. Third box has 4 white, 1 black and 3 red balls. A box is chosen at random and 2 balls are drawn out of which 1 is write, and 1 is red. What is the probability that the ball balls came from first box?
- 6)Match List - I with List – II.
Choose the correct answer from the options given below:List – I (Queries)
List – II (Probability)
A.
A bag contains 6 white and 4 red balls. Two balls are drawn at random. What is the chance, they will be the same colour?
I.
3/68
B.
In a pack of 52 cards, one card is drawn at random, what is the probability that it is either a king or a queen?
II.
14/68
C.
A bag contains 6 red, 4 white and 8 blue balls. If three balls are drawn at random, find the probability of 1 red and 2 white balls?
III.
2/13
D.
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IV.
7/15
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A. n(S) = 8 and n(E) = 4
B. n(E) = 6 and n(S) = 8
C. P(E) = 3 / 4
D. P(E) = 1 / 2
Choose the correct answer from the options given below: - 8)40 software professionals were interviewed for a job. 25 knew PYTHON 20 knew JAVA and 7 knew neither language. How many knew both languages?
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