A person draws out two balls successively from a bag containing 6 red and 4 white balls. The probability that at least one of them will be red is

A and B are two independent events such that P(A $$\cup$$ B') = 0.8 and P(A) = 0.3. Then P(B) is

Three numbers are chosen at random from 1 to 20. The probability that they are consecutive is

Two dice are tossed once. The probability of getting an even number at the first die or a a total of 8 is