Question

There are 10 people at a Christmas party
The mean age of the people is 28
A mysterious stranger joins the party at midnight
The mean age of the people increases to 30
How old was the mysterious stranger?

Answer 1

Answer:

here's the answer:

mean age of people = 28

increased mean age of people =30

so, 28-30=2

2÷28 =14

so 14÷30=0.466666666666

so 0.466666666666+14=14.46666666666

so the age of stranger is 14.46666666666

Answer 2

Step-by-step explanation:

14.46666666666

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