Six boys and six girls sit in a row. The probability that the boys and girls sit alternately will be
None of these
In a regular hexagon, 3 vertices out of 6 are randomly chosen. The probability that the triangle formed out of these three vertices will be an equilateral triangle, is
C.
Only two equilateral triangle are formed, i.e., ABF, CDE
In a competition A, B, C are participating the probability that A wins is twice that of B, the probability that B wins is twice that of C, then probability that A loses is
The probability that a number selected at random from the set of numbers (1, 2, 3, ... , 100) is a cube, is
Two dice are rolled simultaneously. The probability that the sum of the two numbers on the dice is a prime number, is
0.25
The events A andB have probabilities 0.25 and 0.50, respectively. The probability that both A and B occur simultaneously is 0.14, then the probability that neither A nor B occurs, is
0.39
0.29
0.11
0.25
A bag contains 5 black balls, 4 white balls and 3 red balls. If a ball is selected at random, the probability that it is a black or a red ball, is
The probability of getting qualified in IITJEE and EAMCET by a student are respectively . The probability that the student gets qualified for atleast one of these test, is
One die and a coin (both unbiased) are tossed simultaneously. The probability of getting 5 on the top of the die and tail on the coin is
A bag X contains 2 white and 3 black balls and another bag Y contains 4 white and 2 black balls. One bag is selected at random and a ballis drawn from it. Then, the probability for the ball chosen be white, is :