The probability that Andy studies math over break is 0.3 and the probability that Betty independently studies over break is 0.4. Find the probability Andy studies math over break and Betty doesn't.

P(B)=0.4 P(B)=1-0.4=0.6

P(A)=0.3 P(A)=1-0.3=0.7, Ok this is where I'm stuck do I add, Multi, or divide. List of possible answer are. My answer is 0.42 by going from my text book. Is this right. Thanks for any help given.

1. 0.12

2. 0.42

3. 0.18

4. 0.46