The mean of 3 numbers is 12. If one number is 5 and the other is 11 what is the third number
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Answer:20
Step-by-step explanation:mean of 3 numbers is 12.
Let three numbers be a,b,c.
Mean =sum of observation/no.of observations.
12=5+11+c÷3
12=16+c÷3
36=16+c
c=20
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