Two coins are tossed simultaneously. The probability (upto two decimal points accuracy) of getting at least one head is _________.

A simple of $$15$$ data is as follows; $$17,18,17,17,13,18,5,5,6,7,8,9,20,17,3.$$ The mode of the data is

The area (in percentage) under standard normal distribution curve of variable $$Z$$ within limits from $$-3$$ to $$+3$$ is ________.

Consider a Poisson distribution for the tossing of a biased coin. The mean for this distribution is $$\mu $$.

The standard deviation for this distribution is given by