Question

The average age of 3 sisters is 15. If the ages of 2 sisters are 12 years and 15 years, the age of the third sister is option is 21 yrs ,17 years,18 years, 16 years plz solve this question

Answer 1

third sister age is 18 years

Answer 2

Answer:

Step-by-step explanation:  AVERAGE AGE OF 3 SISTERS=15.

                                               TOTAL AGE= 15*3=45

                                               

                                 AGE OF 2 SISTERS ARE 12 AND 15

                                 BOTH SISTERS TOTAL AGE= 12+15=27

 

                            3rd SISTERS AGE= 45-27=18

                            : 3rd sisters age= 18 years.