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In a group of 35 persons, 20 are young and 18 are girls. How many young girls are there in the group?
Question

In a group of 35 persons, 20 are young and 18 are girls. How many young girls are there in the group?

A.

3

B.

1

C.

2

D.

18

Correct option is A

Given:
Total persons = 35
Young persons = 20
Girls = 18
We need to find the number of young girls.
Using the Inclusion-Exclusion Principle, we use the formula:
Young Girls = (Young + Girls) − Total Persons
Young Girls= 38 - 35 = 3 
Thus, the correct option is: (a)

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