Normal distribution has a mean of 80 and a standard deviation of 10 9) The probability of a value between 75 and 90 equals:
A) 0.1498
B) 0.1915
C) 0.3413
D) 0.5328

What is the probability of drawing three queens from a standard deck of cards, given that the first card drawn was a queen? assume that the cards are not replaced.

Simplify the expression. -2/5(10+15m-20n)

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.