If the probability of A to fail in an examination is 0.2 and that for B is 0.3, then probability that either A or B is fail, is
0.5
0.44
0.8
0.25
Five horses are in a race. Mr.A selects two of the horses at random and bets on them. The probability that Mr. A selected the winning horse is
The probability of choosing at random a number that is divisible by 6 or 8 from among 1 to 90 is
A bag contains 5 brown and 4 white socks. A man pulls out two socks. The probability that both the socks are of the same color is
A bag contains 5 white, 7 black and 4 red balls. Three balls are drawn from the bag at random, then the probability that all the three balls are white, is
Three squares of chess board are chosen at random, then the probability that two are of one color and one of another is
Out of 40 consecutive natural numbers, two are chosen at random, then the probability that the sum of these numbers is odd, is
A number is chosen at random among the first 120 natural numbers. The probability if the number chosen being a multiple of 5 or 15 is
1/8
1/5
1/24
1/6
