Question

8. If the mean of the data 3, 21, 25, 17, (x + 3), 19,
(x - 4) is 18, find the value of x. Using this value of x, find the mode of the data. ​

Answer 1

Answer:

21

Step-by-step explanation:

(3+21+25+17+x+3+19+x-4)/7=18

2x+84=126

2x=42

x=21

Answer 2

Answer:

x=21

Step-by-step explanation:

3+21+25+17+x+3+19+x-4/7=18

84+2x=18*7

84+2x=126

2x=126-84=42

x=42/2

x=21