The average of three siste is 15 year the age of 2 sister are 12 years and 15 years the age of 3 sister is
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Answer:
18. Hope it helps!
Step-by-step explanation:
Have a look here,
Sum of number = Average× Number of participants
= 3× 15= 45
ATQ given
Third sister's age= 45-(12+15)
= 45- 27=18.
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