Question
In an Aerobic class, the average age of all the members
was 54.5 years, 11 members left the class and 7 new members joined. If the average age increased by 3 years and the total age decreased by 140, what was the number of members in the class initially?Solution
Let the original member be x Total age of these members = 54.5x Total age of (x – 4) members = (54.5x – 140) years According to the question, 54.5x – 140 = (x – 4) × 57.5 ⇒ 54.5x – 140 = 57.5x – 230 ⇒ 57.5x – 54.5x = 230 – 140 ⇒ 3x = 90 x = 30
What is the primary nitrogenous waste product excreted by humans?
What is an excretory organ of the cockroach?
In the names Mangifera indica (mango), Solanum tuberosum (potato), and Panthera leo (lion), what do the names indica, tuberosum, and leo represent?
Who is regarded as the founder of binomial nomenclature of plants and animals?
Which of the following is the smallest known flowering plant?
Which of the following is a primary symptom of diabetes mellitus?
- Which vitamin enhances iron absorption in the body?
Which disease is characterized by a loss of bone density?Â
Gastric glands are present in the ______.
Vinegar contains which of the following acids?