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marie1211
03.11.2020 •
Mathematics
4 01 8
The following are the ages (years) of 5 people in a room:
22, 21, 23, 24, 17
A person enters the room.
The mean age of the 6 people is now 23.
What is the age of the person who entered the room?
years
Marhs
Solved
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Ответ:
13 years
Step-by-step explanation:
17 + 15 + 23 + 23 + 23 =101 / 5 = 20.2
Mean before was 20.2
In order for the mean to be 19, all those numbers would have to add up 114 to be divided by 6 and have a mean of 19
114 / 6 = 19
114-101 = 13 is that number
17 + 15 + 23 + 23 + 23 + 13 = 114 / 6 = 19
Ответ:
31
Step-by-step explanation:
6×23=138 this will be the total ages for the six people
22+21+23+24+17=107 total ages for the five people
138-107=31
31 is the age of the person who entered the room
Ответ:
the answer is 3.2 i think