What is the mean absolute deviation of the data set?

{20, 10, 30, 20, 50, 30, 40,20}

A. 8

B. 10

C. 12

D. 20

Sean has a collection of coins. One tenth of the coins are from Europe. Thirty-two hundredths are from Asia. The rest are from Africa. Write a decimal to show the total part of the coins that are from Europe or Asia.

Find three consecutive odd numbers whose sum is 1701.

What is the answer to 5 (3x+5) - 7x-2

The United States Postal Service charges a "nonmachinable surcharge" for first-class mail If the length of the envelope (parallel to the address) divided by the height of the envelope is less than 1.3 or more than 2.5.

Pete thinks of a number. He squares it, then takes away 5, next multiplies it by 4, takes away 7, divides it by 3 and finally adds 6. His answer is 45. What number did he start with?

0.3d-1 3 1 3 = 0.84: 7 15

Round 0.579 to the nearest tenth

An online music store offers 5 downloads for $6.25. Another online music store offers 12 downloads for $17.40. Which store offers the better deal?

There are two friends. Each friend has a dollar to buy some pie. The first friend buys two-eighths of a pie for a dollar. The second friend buys one-fourth of a pie for a dollar. Who receives the better deal?

Find the Higher Common Factor (HCF) of 16,48