There were 24 students in a class. One of them, who was 18 years old, left the class and his place was filled up by a new comer.Ifthe average of the class was thereby lowered by 1 month, the age of new comer is-

Question

নিচের অপশন গুলা দেখুন

• 17years
• 15 years
• 16 years
• 14 years

Answer 1

সঠিক উত্তর হচ্ছে: 16 years

ব্যাখ্যা:

Let the age of new comer be x

Avg age decrease by 1/12 year ⇒24 X 1/12 = 18 –x

⇒x=16 years