Verify that a÷(b+c)#(a÷b)+(a÷c) for each of the following values of a=6,b=5 and c=7​

1. if we have 3 babies what is the probability they’re going to be all boys? 2. if we roll 2 die at the same time what is the probability of getting less than 10 on the first roll and a 5 on the second roll 3. if we have 3 babies what is the probability their is going to be 2 girls? 4. if we have 3 babies what is the probability of having no more than 1 girl? 5. it we have 3 babies and then have another 3 babies what is the probability of us having at least 1 boy and then having all girls?

Ineed me i stuck and i don’t want to get it wrong

How is working backward similar to solving an equation?