The answer is 142. Just add all of the numbers together and then you get the answer. Always check your work when you are done. You can use a calculator to do this.
NEXT: 11 15 16 12....
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 + 11 + 12 + 13 + 14 + 15 + 16 + 17 + 18 + 19 + 20 = 210
162
12
14
3 + 11 + 11 + 11 + 12 + 13 + 15 + 15 + 16 + 17 + 19 = 143
12 + 23 + 14 + 11 = 60/4 = 15 The average is therefore 15.
1 is a common factor of 11, 12, 13, 14 and 15.
The average mean is: (11+12+13+14+15)/5 = 13
4/12 + 11/15 = 1 1/15
2545
14 quarters plus 15 dimes plus 12 nickels and 5 pennies is a total amount of $5.65
15 + 14 + 14 + 11 + 2x + x = 75 Collect like terms 54 + 3x = 75 Subtract 54 3x = 21 Divide by 3 x = 7 ■
NEXT: 11 15 16 12....
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 + 11 + 12 + 13 + 14 + 15 + 16 + 17 + 18 + 19 + 20 = 210
162
3-3-3-9-9-11-12-14-15-15-2311 is the median