Answers

2016-07-16T18:19:11+08:00
6 is the X ,because 2,3,5 and 6
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2016-07-16T18:46:50+08:00
Average= (sum of all numbers)/(ilan ung numbers)
4=(2+3+5+x)/(4)
transpose 4
4 x 4= 2+3+5+x
16=10+x
leave x alone
16-10=x
x=6
check:
(2+3+5+x)/(4)=4
(2+3+5+6)/(4)=4
16/4=4
4=4
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