Question

the average of three numbers is20 .if two of these numbers are 16 and 21 then the third number is​

Answer 1

Answer:

23

Step-by-step explanation:16+21+x divided by 3=20

37+x=60

x=60-37

x=23

Answer 2

As we know that average is equal to

Let the third number be x.

Average= sum of all outcomes/total outcomes

20= 16+21+x/3

20= 37+x/3

20×3= 37+x

60 = 37+x

x= 60-37

x= 23

The third number is 23

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