It depends on what you are trying to find if you are trying to find the unit rate for oz/dollar or dollar/oz it differs. But, for the second option it is $0.14 dollars. For the first it is 7.32 oz per dollar. I assume you are trying to find dollar/oz because it makes more sense.
Answer:
42.20
Step-by-step explanation:
132 ×0.32
=42.24
rounded off it give 42.20
The answer is -8 because -4x2 is -8
The reason why the sum of your probabilities equals 0.5 is because you're only considering half of the problem--i.e. the probabilities for only one gender. For example, the probability that there are only three children and all are boys is 1/8. But, remember, it could be the case that there are three children and all are girls. Thus, the probability that there are three children is 1/4--not 1/8. Thus, multiply your result for P(X=4) and P(X=5) by 2 and you should end up with the right answer...