If three unbiased coins are tossed simultaneously, then the probability of exactly two heads, is
A). 1/8
B). 1/8
C). 3/8
D). 4/8
3/8
NA
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1. A bag contains 3 red and 2 yellow marbles. A marble is drawn at random. What is the probability of drawing a red marble?
2. The probability function is always
3. A person speaks the truth 3 out of 5 times. He throws a dice and reports that it is five. Find the probability that it is actually a five.
4. A listing of the possibile outcomes of an experiment and their corresponding probability is called
5. A bag contains 50 tickets numbered 1,2,3,4......50 of which five are drawn at random and arranged in ascending order of magnitude.Find the probability that third drawn ticket is equal to 30.
6. A speaks truth in 75% cases and B in 80% of cases. In what percentage of cases they contradict each other in narrating the same incident?
7. There are 12 boys and 8 girls in a tution centre. If three of them scored first mark, then what is the probability that one of the three is a girl and the other two are boys?
8. One card is drawn at random from a pack of 52 cards. What is the probability that the card drawn is either a red card or a king ?
9. In a simultaneous throw of two dice, what is the probability of getting a total of (7)?
10. Three houses are available in a locality. Three persons apply for the houses. Each applies for one house without consulting others. The probability that all the three apply for the same house is :
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