Total number of outcomes in the experiment of rolling three balanced dice simultaneously is ........

In a shop, there are $50$ packets of tea out of which $5$ are under-weight. One packet is selected at random from the lot. Find the probability that an under-weight packet is selected.

$A$ card is drawn at random from a well-shuffled pack of $52$ cards. Find the probability that the card drawn is that of diamonds.

$A$ jar contains $24$ marbles,some are green and others are blue. If a marble is drawn at random from the jar,the probability that it is green is $\frac{2}{3}$. Find the number of blue balls in the jar.

An unbiased coin is tossed thrice. The probability of receiving two heads is ..........

If you toss a coin $6$ times and it comes down heads on each occasion,can you say that the probability of getting a head is $1$? Give reasons.