Two years ago the mean age of 40 people was 11 years. Now a person left the group and the mean age has changed to 12 years. Find the age of the person who left the group.
Attachments:
Answers
Answered by
0
Answer:
Two years ago the mean age of 40 people was 11 years . ⇒ So, at present the mean age will be increased by 2,. Hence, the mean age at present will be 11 + 2 = 13 years
Answered by
0
Step-by-step explanation:
I hope this might help you
Attachments:
Similar questions