Find the probability that there is a Sunday on $26$ January in any given year.

$A$ box contains $100$ cards marked with numbers $1$ to $100$. If one card is drawn at random from the box,find the probability that the number on the card is: $(1)$ a multiple of $7$,$(2)$ a number smaller than $30$,$(3)$ a prime number.

The marks obtained by a student in five tests are as follows:

< strong>Test Number	< strong>Marks obtained
$1$	$62$
$2$	$72$
$3$	$78$
$4$	$91$
$5$	$85$

If one of the tests is chosen at random,find the probability that the student scored $(1)$ more than $90$ marks and $(2)$ between $70$ and $80$ marks in that test.

In a sample study of $642$ people,it was found that $514$ people have a high school certificate. If a person is selected at random,the probability that the person has a high school certificate is:

Three coins are tossed simultaneously $500$ times with the following frequencies of different outcomes:

Number of heads	$0$	$1$	$2$	$3$
Frequency	$70$	$190$	$175$	$65$

Find the probability of getting $0, 1, 2$ or $3$ heads.
Verify that the sum of all these probabilities is $1$.

The probability of a month of February having $5$ Mondays in a leap year is ............