Out of $700$ women in an area,$280$ are employed. Find the probability that a randomly selected woman from those women is employed.

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

The probability that a non-leap year should have $53$ Sundays is ............ (in $/7$)

$50$ families with $2$ children were selected randomly and the following data were recorded:

Number of girls in a family	$0$	$1$	$2$
Number of families	$10$	$32$	$8$

If a family is chosen at random,compute the probability that it has: $(1)$ two girls,$(2)$ one girl,$(3)$ no girl.

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 that a leap year,selected at random,will contain $53$ Sundays is .........