Bissoy.com
Doctors Medicines MCQs Q&A

Average weight of 25 girls is increased by 1 kg when one girl of weight is 50 kg is replaced by new girl then find the weight of new girl.

Average weight of 25 girls is increased by 1 kg when one girl of weight is 50 kg is replaced by new girl then find the weight of new girl. Correct Answer 75 kg

Given:

Weight of replaced girl = 50 kg

Average weight of 25 girls is increased by 1 kg

Concept:

Simple concept of average

Calculation:

Total increased weight of each girl = 1 kg

⇒ Total increased weight of 25 girls = 25 kg

Now, the weight of new girl must be more than 50 kg, because she replaces the girl of weight of 50 kg.

⇒ The weight of new girl = Weight of replaced girl + Total increased weight of 25 girls

⇒ The weight of new girl = 50 kg + 25 kg

⇒ The weight of new girl = 75 kg

∴ The weight of new girl is 75 kg

Related Questions

Questions below followed by three quantities. Find the relationship between them. Quantity I: In a class with a certain number of students if a teacher weighing 78 kg is added, then average weight of class is increased by 2 kg. If one more teacher weighing 66 kg is added, then the average weight of the class increases by 3.5 kg over the original average. What is the original average weight (in kg) of the class? Quantity II: The average age of 16 students and their teacher's age is 16 years. If the teacher's age is excluded, the average reduces by 2. What is the teacher's age? Quantity III: Average weight of three friends A, B and C is 46 kg. Another person D joins the group and now the average is 45 kg. If another person E whose weight is 6 kg more than D, joins the group replacing A, then average weight of B, C, D and E becomes 47 kg. What is the weight of A (in kg)?
The average weight of a group of 10 girls is 48 kilograms. If 2 girls R and S, replace by P and Q then the new average weight is 46 kg. The weight of P is equal to the weight of Q and the weight of R is equal to the weight of S, another girl T joins the group and the new average weight of the group becomes 46 kg. The weight of T is equal to the weight of P. What is the weight (in kg) of R?
The average weight of a group of 12 girls is 48 kg. If 2 girls R and S replace P and Q, the new average weight becomes 46 kg. The weight of P = the weight of Q. The weight of R = the weight of S. Another girl T, is included in the group and the new average weight becomes 46 kg. The weight of T = the weight of R. What is the weight of P (in kg)?
In the following question, two statements are numbered as A and B. On solving these statements we get quantities A and B respectively. Solve for the both quantities and chose the correct option. Quantity A: The average weight of 24 men is increased by 1.5 kg when a man in the crew whose weight is 50 kg is replaced by a new man. Find the weight of the new man? Quantity B: The average weight of a class of 40 students is 46 kg. If the weight of teacher is included with the students, the new average becomes 47 kg. Find the weight of teacher?
In a coaching institute in Mukherjee Nagar, there are 252 students, in which the ratio of boys and girls is 2 : 1. Some more girls are enrolled, and the number of girls become equal to that of the boys. The average age of all the students is now 22 years and the average age of boys is 2 years more than the average age of the girls. Find the average age of boys and girls.
In a class, the number of girls is 60% more than the number of boys. Boys have an average weight of 2.6 kg more than girls. If the average weight of all boys and girls is 50 kg, then what is the average weight (in kg) of girls?
A class has 20 boys and 20 girls. The average age of girls in the class is 16 years and the average age of boys in the class is 17 years. One girl and one boy leave the class and the average age of the girls reduced by 1 year and that of boys reduced by 2 years. Find the new average age of the whole class.
UPA government has decided to distribute laptops, mobile phones and tablet under its new campaign for the empowerment and elementary education for girls in schools and colleges. They distributed laptops for college girls, mobile for safety purposes and tablets to girls studying in classes 10 up-to classes 12. The state has total 35 Lakh girls, out of which 20% are not getting any education and 5% of the remaining are in college and 10% of the remaining are studying in class 10 to class 12, and the girls who are in PG got 4,20,000 total tablets, which contributes the 15% of the distribution, then find the number of laptops which were distributed. (The distribution is according to the number of girls). 
In a school, there are 20 girls. The average age of the girls is decreased by 2 months when one girl aged 18 years is replaced by a new girl. What is the age of the new girl?
Each question below is followed by two statements I and II. You have to determine whether the data given in the statements are sufficient for answering the question. You should use the data and your knowledge of Mathematics to choose the best possible answer. What is the average weight of new students added? I. In a class 60% students are male and there average weight is 15 kg more than the female students, 9 males and 6 new female students joined the class and the average weight of the class increased by 0.84 II. Total male students in the class is 12 more than female students adding 9 male students to the class increases the average weight of male students by 1 kg and adding 6 female students increases the average weight of female students by 0.6.