**Normal Approximation for Binomial Random Variable example problem**

The median age of residents of the United States is 37.2 years. If a survey of 200 residents is taken, approximate the probability that at least 110 will be under 37.2 years of age.

Solution to this probability **Binomial Distribution Normal Approximation** practice problem is given in the video below!

**Binomial Random Variable Normal Approximation HARD example question**

The weekly amount sent by a small company for in-state travel has approximately a normal distribution with mean $1450 and standard deviation $220.

(a) What is the probability that the actual expenses will exceed $1560 in 20 or more weeks during the next year?

(b) What is the probability that the actual expenses would exceed $1500 for between 18 and 24 weeks, inclusive during the next year?

Solution to this probability **Binomial Distribution Normal Approximation** problem is given in the video below!

Thanks for the clear explanation. Now I know how Normal and Binomial Distributions relate!