EASY
IBPS RRB Office Assistant Mains
IMPORTANT
Earn 100
If are independent events, then equals :
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Important Questions on Probability
EASY
IBPS RRB Office Assistant Mains
IMPORTANT
Three letters are written to different persons, and addresses on three envelopes are also written. Without looking at the addresses, the probability that the letters go into right envelopes is :
MEDIUM
IBPS RRB Office Assistant Mains
IMPORTANT
When dialing a telephone number, you forget the last two digits; remembering only that they were different you dial at random. What is the possibility of dialing the correct number?
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IBPS RRB Office Assistant Mains
IMPORTANT
The probability that a student is not a swimmer is . Then the probability that out of five students, four are swimmers is:
MEDIUM
IBPS RRB Office Assistant Mains
IMPORTANT
The probability that a marksman will hit a target is given as . Then his probability of at least one hit in shots is :
EASY
IBPS RRB Office Assistant Mains
IMPORTANT
Three fair dice are thrown.The possibility of getting a total less than is:
MEDIUM
IBPS RRB Office Assistant Mains
IMPORTANT
The odds in favour of A winning a game of chess against B are . If three games are to be played, then the odds in favour of A winning at least one game are . Check whether the above statement is True or False.
EASY
IBPS RRB Office Assistant Mains
IMPORTANT
The probability that a card drawn at random from a pack of cards is a king or a heart is:
MEDIUM
IBPS RRB Office Assistant Mains
IMPORTANT
A problem is given to three persons and their chances of solving it are respectively. This probability that none will solve it is:
