Stmt I
Clearly insufficient
No info about 1980 or 1990
Stmt II
Let the pop in 1970 be x
1980 = 1.2x
1990 = 1.3x
Percent Increase(1980-1990) = New(1990)-Old(1980)/Old(1980) *100
= 1.3x-1.2x / 1.2x *100
= .1x/1.2x*100
= 10/1.2 = 8.3%
No caculation needed once u know stm II is SUFF but i have included it for your FYI
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