Multiple choice

Average age of ten learning yoga is $32$ yrs. When the age of their instructor is added, the average age becomes $34$ yrs. The age of their instructor is

  1. $54$
  2. $52$
  3. $46$
  4. $56$
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A Correct answer
Explanation

Total age of 10 people = 10 * 32 = 320. Total age of 11 people (including instructor) = 11 * 34 = 374. Instructor age = 374 - 320 = 54.

AI explanation

The total age of the ten learners is 10 times 32, which equals 320 years. Adding the instructor makes the total age for 11 people equal to 11 times 34, giving 374 years. The age of the instructor is the difference between the new total and the original total, so 374 minus 320 equals 54 years.

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