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 ā 4) members = (54.5x Ā ā 140) years According to the question, Ā 54.5x Ā ā 140 = (x Ā ā 4) `xx` 57.5 ā 54.5x Ā ā 140 = 57.5x Ā ā 230Ā ā 57.5x Ā ā 54.5x Ā = 230 ā 140 ā 3x = 90 Ā x = 30
Which one of the following terminology for viruses which feed on bacteria?
AĀ farmĀ onĀ whichĀ 50%Ā orĀ moreĀ ofĀ theĀ receiptsĀ areĀ from sugarcaneĀ wouldĀ beĀ classifiedĀ as sugarcaneĀ farm, this is an example...
Microbodies associated with mitochondria and chloroplasts containing the enzyme glycolate oxidase are known as
Which among the following weeds causes dropsy disease in human beings:
Which soil texture is most susceptible to waterlogging?
Micro propagation is an efficient alternative method of vegetative propagation since:
A. True-to-type plants are produced.
B. Multiplicati...
Which soil has highest water use efficiency?
Which of the following statements best explains the term āheterosisā in the context of hybrid crop breeding?
Which insecticide formulation consists of active ingredient mixed with a liquid solvent that needs to be diluted with water prior to application?
How can a ānaiadā in entomology be best described among the following developmental stages?