All possible words (with or without meaning) are formed by taking atleast 2 letters (all different) from the letters of the word 'CURVE'. If a word is chosen at random from all the words thus formed, then the probability of getting $a$ letter word is

Three numbers are chosen from 1 to 30 . The probability that they are not three consecutive numbers is

If two events $A$ and $B$ are such that $P(\bar{A})=03, P(B)=0.4$ and $P(A \cap \bar{B})=0.5$, then $P(B / A \cup \bar{B})=$

Two candidates $A$ and $B$ have attended an interview conducted by a recruitment board for two jobs, If the probability that candidate $A$ will get the job is 0.8 and the probability that candidate $B$ will get the job is 0.7 , then the probability that atleast one of them will get the job is