476,874 views
3 votes
3 votes
The following are the ages (years) of 5 people in a room:

17, 21, 15, 15, 25
A person enters the room.
The mean age of the 6 people is now 25.
What is the age of the person who entered the room?​

User JohnAl
by
2.8k points

2 Answers

15 votes
15 votes

Answer:

age=57

Explanation:

ages=17 21 15 15 25 ?

17+21+15+15+25=93(old mean)

17+21+15+15+25+?=25(new mean)

25(new mean)*6(number of numbers)=150

?=150-93=57

= 57

User Aegar
by
2.9k points
23 votes
23 votes

Answer:

57 years

Explanation:

total=25*6=150

17+21+15+15+25+x=150

93+x=150

x=150-93

x=57

User IPeter
by
3.0k points