A certain bakery only sells bread. It sells bread at a regular price throughout the day, but decreases its price by y percent after 6 pm. Today, the bakery sold 300 loaves of bread. Did the bakery make more than $1450 today?
(1)y = 60
(2)Fully priced loaves of bread cost $12.50 each.
let n(A) be number of bread sold before 6PM and p(A) be proce of each such bread, Similarly, let n(B) be number of bread sold post 6PM and p(B) be proce of each such bread.
Q is asking if n(A)*p(A)+n(B)*p(B)>=1450
so three unknowns are there n(A), y & p(A)
statement 1: y= 60%, but we donot know other 2 variables=> not sufficient
Statement 2: p(A)=$12.50, but we donot know other 2 variables=> not sufficient
1+2=> y=60% & p(A)=$12.5
=> p(B)= (1-0.6)*12.5= 5$
even if p(A)=0=> p(B)=300
total sale= 300*5=$1500> $1450, hence SUFFICIENT
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