Question : The average mark obtained in a class of 50 students is 70%. The average of the first 25 is 60% and that of 24 is 80%. What were the marks obtained by the last student?
Option 1: 90%
Option 2: 60%
Option 3: 80%
Option 4: 70%
Latest: SSC CGL preparation tips to crack the exam
Don't Miss: SSC CGL complete guide
New: Unlock 10% OFF on PTE Academic. Use Code: 'C360SPL10'
Correct Answer: 80%
Solution : Average marks of 50 students = 70% Total percentage of marks of 50 students = 50 × 70% = 3500% Average of first 25 students = 60% Total percentage of marks of 25 students = 25 × 60% = 1500% Average marks of the next 24 students = 80% Total percentage of marks of 24 students = 24 × 80% = 1920% $\therefore$ Percentage of marks obtained by the last student = 3500% – (1500 + 1920)% = 80% Hence, the correct answer is 80%.
Candidates can download this ebook to know all about SSC CGL.
Answer Key | Eligibility | Application | Selection Process | Preparation Tips | Result | Admit Card
Question : The average mark obtained by a class of 60 students is 65. The average marks of half of the students were found to be 85. The average marks of the remaining students are:
Question : The average weight of 100 students is 32 kg. The average weight of the first 49 students is 30 kg and that of the last 50 students is 34 kg. What is the weight (in kg) of the 50th student?
Question : The average mark obtained by 100 candidates in a certain examination is 30. If the average marks of passed candidates are 35 and those of failed candidates are 10, what is the number of candidates who passed the examination?
Question : The average mark of 60 students in a class is 62. The average marks of boys and girls in that subject are 60 and 65, respectively. The number of boys in the class is:
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile