A box contains $10$ good articles and $6$ with defects. One article is chosen at random. What is the probability that it is either good or has a defect
$\frac{{24}}{{64}}$
$\frac{{40}}{{64}}$
$\frac{{49}}{{64}}$
$\frac{{64}}{{64}}$
If $A$ is a sure event, then the value of $P (A$ not ) is
In order to get at least once a head with probability $ \ge 0.9,$ the number of times a coin needs to be tossed is
Three coins are tossed once. Find the probability of getting $2$ heads
A coin is tossed. If it shows head, we draw a ball from a bag consisting of $3$ blue and $4$ white balls; if it shows tail we throw a die. Describe the sample space of this experiment.
Three coins are tossed once. Find the probability of getting $3 $ heads