Suppose that a die (with faces marked $1$ to $6$) is loaded in such a manner that for $K = 1, 2, 3…., 6$, the probability of the face marked $K$ turning up when die is tossed is proportional to $K$. The probability of the event that the outcome of a toss of the die will be an even number is equal to
$\frac{1}{2}$
$\frac{4}{7}$
$\frac{2}{5}$
$\frac{1}{{21}}$
The probability that a marksman will hit a target is given as $1/5$. Then his probability of at least one hit in $10$ shots, is
Two cards are drawn without replacement from a well-shuffled pack. Find the probability that one of them is an ace of heart
Three coins are tossed once. Find the probability of getting $3$ tails.
From a pack of $52$ cards two are drawn with replacement. The probability, that the first is a diamond and the second is a king, is
Two dice are thrown simultaneously. What is the probability of obtaining sum of the numbers less than $11$