Question

If the AM of 7,5,13,x and9is10,then x is

Answer 1

No. of numbers = 5
It's AM is 10

AM =
$sum \: of \: all \: numbers \div total \: numbers$
=7+5+13+9+x/5 =10
=34+x/5 =10
=34+x =50
x = 50-34
x = 16

Therefore, X is 16.
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