She buys 24 dvds in 12 weeks.
I'm not sure which numbers you are referring to, but 3 has the same absolute value as -3, and 7 has the same absolute value as -7, just for an example.
I think the answer is 8.5 ,I’m not sure about this tho
20% can be represented as 1/5.
Therefore you're expected to win 1 ticket out of every 5 you purchase. So if you purchase 50 you can expect to win 10 tickets. Therefore the answer is C.
