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liberstina [14]
4 years ago
9

The mean age of 5 people in a room is 31 years.

Mathematics
1 answer:
balandron [24]4 years ago
6 0

Answer:

25 year

Step-by-step explanation:

Mean = sum/no. *of observations

Initially, number of people = 5 & let the sum of their ages be S.

=> 31 = S/5

=> 155 = S

When one more entered, number = 6. Let his age be 'a'.

Sum of ages = S + a = 155 + a

=> 30 = (155 + a)/6

=> 180 = 155 + a

=> 25 = a

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