The average age of 30 students is 15 years. If the teacher's age is included, the average increases by 1 year. What is the teacher's age? 30 छात्रों की औसत आयु 15 वर्ष है। यदि शिक्षक की आयु शामिल कर ली जाए, तो औसत 1 वर्ष बढ़ जाता है। शिक्षक की आयु क्या है?
A
31 years (31 वर्ष)
B
45 years (45 वर्ष)
C
46 years (46 वर्ष)
D
50 years (50 वर्ष)
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Correct Answer 46 years
Explanation
Total age of 30 students = $30 imes 15 = 450$. New total age (31 people) = $31 imes 16 = 496$. Teacher's age = $496 - 450 = 46$ years.