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natita [175]
3 years ago
6

The following are the ages (years) of 5 people in a room:

Mathematics
2 answers:
Olegator [25]3 years ago
6 0

Answer:

39

Step-by-step explanation:

<u>13 + 13 + 19 + 23 + 19 + x</u> = 21

                       6

Combine like terms

(87 + x) / 6 = 21                  Multiply both sides by 6

(87 + x )  = 21 * 6

87 + x = 126                       Subtract 87 from both sides

x = 126 - 87

x = 39

The 6th person entering the room was 39

Jobisdone [24]3 years ago
4 0

Answer:Answer:

the added person age is 26

Step-by-step explanation:

let the added person age is A

the six person mean is (23+19+12+21+13+A)/6=19

=> 88+A/6=19

=>A=(19×6)-88

there fore A=26

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