Question

the avarge of three sister is 12,13what is the avarage of the 3 th sister
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Answer 1

Answer:

14

Step-by-step explanation:

14

it is the correct answer

Answer 2

Answer:

The average age of three sisters is 15

Sum of age of three sisters = average age × no. of sisters

Sum of age of three sisters = 15 × 3 = 45 years

The age of two sister is 12 and 15.

Sum of age of two sisters = 12 + 15 = 27 years

Age of third sister = 45 - 27 = 18 years

Answer the age of third sister is 18 years

Now checking the correctness of answer by taking their average

Average = (18 + 12 + 15)/3

15 = 45/3

15 = 15

Step-by-step explanation:

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