Gina has 20 collector's stamps. 8 stamps are blue, 6 are red, and 5 have both colors. if a stamp is chosen at random, what is the probability that the stamp has a blue or red color on it?

How would you work out dimensions

Round 71195.4277573 to 2 decimal places.

Joseph tweets 13 times a day. define each variable and write an algebraic expression to describe the number of post after any given given number of days.

Ratio is 2/3. Total number is 500.

How do you simplify (n!) ^2 / (n+1) ! (n-1) !

The town of manchester (50,000) has the shape of a rectangle that is 5 miles wide and 7 miles long. What is the population density, in people per square mile, in Manchester? Round your answer to the nearest whole number of people per sqaure mile.

42/45 greater or less than 3/15

Empire Ford wants to estimate the proportion of trucks compared to all vehicles. They take several random samples of size 100 from the reserved parking lot (where there are numbered, pre-assigned parking spaces) at the Avista baseball stadium.

A square piece of gold has sides that are 9 millimeters long what is the piece of golds area in square millimeters

What's the least common multiple of 76