In a group of 15 , 7 have studied Latin , 8 have studied Greek, and 3 have not studied either . How many of these studied both Latin and Greek ?

0

3

4

5

None of these

Description (বিবরণ) :

প্রশ্ন: In a group of 15 , 7 have studied Latin , 8 have studied Greek, and 3 have not studied either . How many of these studied both Latin and Greek ?

ব্যাখ্যা:

( 7 - x) + x + ( 8 - x) + 3 = 15

18 - x = 15

x = 18 - 15

x = 3

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