Mountain14
Did Jeff record more sales revenue this month than Dan did?
(1) Jeff earned 20% more in sales commission this month than Dan did.
(2) Dan earns 6% commission on his sales, and Jeff earns 8% commission on his.
Based on revenue, salespeople earn commission. We need to know whether Jeff recorded more revenue than Dan.
(1) Jeff earned 20% more in sales commission this month than Dan did.
Jeff's more commission doesn't imply more revenue, Their rate of commission could be different (as given in stmnt 2) due to their different profile, the products they sell could offer varying commissions etc
(2) Dan earns 6% commission on his sales, and Jeff earns 8% commission on his.
This alone is not sufficient since we don't know who got more commission in absolute terms.
Using both, we know that Dan earns 6% and Jeff earns 8%. This means for every $100 of revenue, Dan gets $6 and Jeff gets $8 so Jeff gets (2/6)*100 = 33.33% more than Dan for same revenue.
Had their revenue been same, Jeff would have earned 33.33% more than Dan in commission. Since Jeff earned only 20% more in commission, his revenue must have been less than that of Dan. Both statements together are sufficient.
Answer (C)
I am not able to understand the reasoning, Why are we assuming that both of them are getting percentage on same amount,
It's commission so one's sale could be 10000$ while other's sale could be 10$ so how can the percentage give me the correct answer?