Answer:
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
Answer:
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
