The average age of 24 students is 15.5 years. The age of the teacher is 24 years more than the average age of all the students and teacher. What is the age (in years) of the teacher?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 40.5
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Application |
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Total age of the students = 24 × 15.5 = 372 |
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Let the age of teacher = x ⇒ (372 + x)/25 = x - 24 ⇒ (372 + x) = 25x - 600 ⇒ 372 + 600 = 25x - x ⇒ 24x = 972 ⇒ x = 40.5 Hence, Age of teacher = 40.5 years |