The numbers `(a ,b ,c)` are selected by throwing a dice thrice, then the probability that `(a ,b ,c)` are in A.P. is `1//12` b. `1//6` c. `1//4` d. none of these

If three dice are throw simultaneously, then the probability of getting a score of 5 is a. 5/216 b. 1/6 c. 1/36 d. none of these

Two dice are thrown simultaneously. the probability of getting a pair of aces is a. 1/36 b. 1/3 c. 1/6 d. none of these

Two dice are thrown simultaneously. the probability of obtaining a total score of 5 is a. 1/18 b. 1/12 c. 1/9 d. none of these

A month is selected at random in a year.The probability that it is March or October,is (1)/(12) (b) (1)/(6) (c) (3)/(4) (d) None of these

If a,b,c are in G.P. then prove that (1)/(a+b),(1)/(2b),(1)/(b+c) are also in A.P.

Two dice are tossed.The probability that the total score is a prime number is (1)/(6) (b) (1)/(2) (c) (5)/(12) (d) (7)/(9) (e) None of these

Let A,B,C,D be independent events such that P(A)=1/2,P(B)=1/3,P(C)=1/5, and P(D)=1/6 Then theprobabizlity that none of A,B,C, and D occurs 1/180 b.1/45 c.1/18 d.none of these

If a, b, c are in A.P., b, c, d are in G.P. and 1/c ,""1/d ,""1/e are in A.P. prove that a, c, e are in G.P.

Let the positive numbers a ,b ,ca d nd be in the A.P. Then a b c ,a b d ,a c d ,a n db c d are a. not in A.P. /G.P./H.P. b. in A.P. c. in G.P. d. in H.P.