For a standard normal variate, the value of Standard Deviation is :

The area under a standard normal curve is:

For a standard normal variate, the value of mean is:

Normal Distribution is symmetric is about:

 Normal Distribution is applied for:

A bag has 2 defective calculators and 8 working calculators. You pick one at random and it doesn't work. What is the probability the second calculator you pick will work, given the first one was defective?

A bowl has 10 cookies: 5 chocolate chip and 5 oatmeal raisin. You take out a chocolate chip cookie. What is the probability the next cookie you take will be oatmeal raisin?

A bag contains 10 coins: 4 fair coins and 6 biased coins (always land on heads). You pick a coin at random, flip it, and it lands on heads. What is the probability the second coin you pick, also flipped, will land on heads ?

A deck of cards has 4 queens. You draw a card and it's a queen. You don't put it back. What is the probability the second card you draw will also be a queen?

A jar contains 10 red jellybeans and 5 green jellybeans. You pick a jellybean at random and eat it. What is the probability the second jellybean you pick is green, given the first one you picked was red?