Final answer:
In a world of 100 people, 10 people would be represented by the 10-letter term signifying the lack of 2 skills.
Step-by-step explanation:
To find out how many people out of 100 would lack 2 skills, we first need to determine what percentage of 100 represents 2 skills. Since we have 10-letter term and the lack of 2 skills, we can divide the total number of possible terms (100) by the number of terms representing the lack of 2 skills (10) to get 10%. Therefore, there would be 10 people out of 100 who would be represented by this 10-letter term. Hence, the correct answer is a) 7.