Weekly wages at a certain factory are normally distributed with a mean of
$400 and a standard deviation of $50.
Find the probabillity that a worker
selected at random makes between
$300 and $350.

Tod does not have any cookies. david gives jeff 8 cookies. then he splits half of the cookies he has left with tod. david let’s c represent the number of cookies that he starts with. he finds the number of cookies that tod has is 1/2 the difference of c and 8. write an expression to represent the number of cookies that tod has.

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.

9/10 divide by -3/15 as a mixed number