Multiple choice

The average age of 30 students is 15 years. If teacher's age is included, the average age is increased by 1 year. What is the teacher's age?

  1. 56 years

  2. 46 years

  3. 35 years

  4. 45 years

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total age of 30 students = 30*15 = 450 years. With teacher, 31 people average = 16 years. Total = 31*16 = 496 years. Teacher's age = 496 - 450 = 46 years. Option B is correct.

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