Question

2. If the mean of 9, 10, 11, x, 12, 6, 8, 14, 15, and 18 is 11, Find the value of x​

Answer 1

Answer:

x=7

Step-by-step explanation:

mean=(9+10+11+x+12+6+8+14+15+18)/10

11=(103+x)/10

110=103+x

x=110-103

x=7

Answer 2

Answer:

7

Step-by-step explanation:

(9+10+11+x+12+6+8+14+15+18)/10=11

=>103+x=10×11

=>x=110-103=7