Answer:
8
Step-by-step explanation:
There are 42 people who had breakfast. Each person had either egg or pancake or both.
Of these only eggs were 2/3 and both were 2/3
Hence the remaining ate only pancakes
i.e. portion of persons who ate pancakes = 1-(1/7+2/3)
= 4/21
Total no of people in the restaurant = 42
Of those people who ate eggs only= 1/7 (42) = 6
No of persons who ate both pancakes and eggs = 2/3(42) = 28
Hence no of persons who ate only pancakes =42-(6+28) = 8
