MEDIUM
IBPS RRB Office Assistant Mains
IMPORTANT
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Five letters are sent to different persons and addresses on the five envelopes are written at random. The probability that all the letters do not reach the correct destiny is:
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Important Questions on Probability
MEDIUM
IBPS RRB Office Assistant Mains
IMPORTANT
If denotes the number of sixes in four consecutive throw of a dice, then is:
MEDIUM
IBPS RRB Office Assistant Mains
IMPORTANT
A coin is tossed times. The probability of getting a head three times is
MEDIUM
IBPS RRB Office Assistant Mains
IMPORTANT
Three letters are written to different persons and addresses on the envelopes are also written. Without looking at the addresses, the letters are put into envelopes, the probability that letters go into the right envelopes is:
MEDIUM
IBPS RRB Office Assistant Mains
IMPORTANT
If three dice are thrown simultaneously, then the probability of getting a score of is
EASY
IBPS RRB Office Assistant Mains
IMPORTANT
Let and be two independent events. The probability that both and occurs is and the probability that neither nor occurs is The respective probabilities of and are:
EASY
IBPS RRB Office Assistant Mains
IMPORTANT
In a single throw of two dice, the probability of getting a total of or is:
EASY
IBPS RRB Office Assistant Mains
IMPORTANT
If , the probability that , is a multiple of is:
EASY
IBPS RRB Office Assistant Mains
IMPORTANT
A box contains fifty tickets each bearing one of the numbers from to . Five tickets are drawn out at random and arranged in ascending order such as . The chance that is:
