If the standard deviation of 4, 7, x, 10 and 11 is √6, find the value of x and hence calculate the mean deviation.

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

You have 17 cats that live in houses on your street, 24 dogs, 3 fish, and 4 hamsters. what percent of animals on your block are dogs?

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?