I forgot how to do this. I just need an answer.

Three coins are flipped. what is the probability that there will be at least two tails?

What is the reflection image of (5,-3) across the line y = -x?

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.