Please explain how 10 will be the output

Question

p={1:5, 2:5, 3:6}
print (p.get(8,4)+p.get(7,6)

Answer 1

get() has two parameters: first is the key you want to look up in the dictionary, second is the default value to use, when the key doesn't exist.
Dictionary p has keys 1, 2 and 3
So 8 and 7 are not keys, hence the default value 4 and 6 are used in both cases.