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

Five cards - the ten,jack,queen,king and ace of diamonds,are well-shuffled with their face downwards. One card is then picked up at random.
$(i)$ What is the probability that the card is the queen?
$(ii)$ If the queen is drawn and put aside,what is the probability that the second card picked up is $(a)$ an $ace?$ $(b)$ a $queen?$

Three unbiased coins are tossed simultaneously. Then,the probability of receiving at least two heads 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.

An integer is chosen between $0$ and $100$. What is the probability that it is
$(i)$ divisible by $7?$
$(ii)$ not divisible by $7?$

Total number of outcomes in the experiment of throwing a balanced die twice is ..........