Bissoy.com
Doctors Medicines MCQs Q&A

The average marks of the first 11 students of a class are 46 and the average marks of the last 11 students of a class are 44. The average class of 21 students in the class is 45. What will be the average marks of the first 10 students? 

The average marks of the first 11 students of a class are 46 and the average marks of the last 11 students of a class are 44. The average class of 21 students in the class is 45. What will be the average marks of the first 10 students?  Correct Answer 46.1

Total marks of first 11 students of class = 11 × 46 = 506

Total marks of last 11 students of class = 11 × 44 = 484

Total marks of 22 students of class = 21 × 45 = 945

The marks of 11th student = 506 + 484 – 945 = 45

Total marks of first 10 students = 506 – 45 = 461

∴ Required average = 461/10 = 46.1

Related Questions

In an examination, there were three subjects Hindi, Maths, and Science. Marks scored by Karan in Hindi is 60. Marks scored by Karan and Lokesh in Maths is equal. Marks scored in 3 subjects by Lokesh is 200. Marks scored by Lokesh in science is 25 % of total marks obtained. Marks scored by Mohit in Hindi is equal to marks scored by Lokesh in Maths. Marks scored in Maths by Mohit is 5 more than the marks scored in Hindi. Marks scored in Maths by Lokesh is 20 more than marks scored in Science. Marks obtained by Karan, Lokesh, and Mohit in Hindi are what percent of marks obtained by Karan, Lokesh, and Mohit in Maths?
The marks of 30 students in a test is shown as follows: 12, 16, 22, 24, 11, 7, 9, 11, 13, 14, 17, 19, 18, 21, 22, 23, 8, 9, 17, 16, 14, 23, 24, 24, 23, 17, 18, 16, 11, 9  Which Tally table represent the correct data of the marks of the students. (A) Interval of marks Tally marks of students 0-5 0 5-10 ||||  10-15 |||| || 15-20 |||| |||| 20-25 |||| ||||   (B)  Interval of marks Tally marks of students 0-5 0 5-10 |||| | 10-15 |||| ||| 15-20 |||| |||| 20-25 |||| || (C) Interval of marks Tally marks of students 0-5 0 5-10 |||| | 10-15 |||| || 15-20 |||| |||| 20-25 |||| || (D) Interval of marks Tally marks of students 0-5 0 5-10 ||||  10-15 |||| || 15-20 |||| ||| 20-25 |||| ||||
The average marks obtained by 42 students of class A is 79 whereas, the average marks of 38 students of class B is 76. If marks of 5 students are removed who got minimum marks from class A, the average marks of class A is increased by 3 marks, then find the new average marks of class A and B.
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 choose the correct option. Quantity A: Vinay secured 92.5% marks in an examination comprising of 5 subjects each of 120 marks. He scored 95% marks in English and Hindi together, while 90% marks in Mathematics. In Science, if he scored one marks more than Social studies, how many marks did he scored in Science? Quantity B: Ashi scored 75%, 80% and 90% marks in Physics, Chemistry and Mathematics sections respectively, in an examination of total 150 marks. If the Physics and Chemistry sections are worth 40% and 20% of the total marks, how many marks did Ashi secured in the examination? 
Seven students – P, Q, R, S, T, U, and V got the highest marks in Mathematics test among all students. Their marks out of 50 are 40, 42, 45, 46, 48, 50 (not necessarily in the same order). Two students have got the same marks as 46. P has neither got the lowest marks nor 46. Q has got the highest marks. U has got higher marks than P. R has got lower marks than T whereas T got lower than P. S has got lower marks than U. Who among the following has got the same marks as 46?
The average marks of the class were 60. When 12 students having average marks 65 left the class and 7 students having average marks 80 joined the class, then average marks of the class increased by 4 marks. The number of students, initially, in the class∶
The ratio of marks obtained by Rohit in Mathematics to the marks obtained in Science is 8 : 7, the marks of English is 10% more than the marks obtained in Science and the marks obtained in Hindi is 10% less than the marks obtained in Mathematics. If each subject is of 100 marks and the sum of marks of English and Hindi is 149, then find the percentage of passing mark where the passing marks is 40 more than the marks obtained by Rohit in Mathematics.
In an examination, the difference of the highest and the least marks is 33. When the average of marks was taken without considering the highest marks then the average was reduced by 2% but when the average of marks was taken without considering the least marks then the average of the marks was increased by 3%. If there are 76 students, find the original average of the marks of all the students?
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.
Ghanshyam and Raju got their marks(out of 50 marks) in 4 subjects i.e English, Science, Maths and Social. The avg marks obtained by Raju is 38. The ratio of marks obtained by Raju and Ghanshyam in Maths is 5 ∶ 6 and the average marks obtained by Ghanshyam is 41. If the marks scored by both of them in English and Science is same and in Social Raju got 5 marks less than Ghanshyam. What is the marks scored by them in English and Science if Raju scored 40 marks in Social?