Exams › SSC CGL (Prelims) › Maths
A class of 30 students appeared in a test. The average score of 12 students is 62, and that of the rest is 74. What is the average score of the class?
- 70.2
- 69.2
- 68.2
- 67.2
Correct answer: 69.2
Solution
The first 12 students have total marks $12\times 62=744$. The remaining 18 students have total marks $18\times 74=1332$. The class total is 2076, so the average is $2076/30=69.2$.
Related SSC CGL (Prelims) Maths questions
- The average of the squares of the first 45 natural numbers is:
- What is the median of the following numbers: 7, 9, 12, 15, 19?
- A number whose fifth part increased by 5 is equal to its third part decreased by 7. Find half of the number.
- If (48^ + k) is an acute angle and sin(48^ + k) = cos 13^, what is the value of k (in degrees)?
- If ₹1,875 becomes ₹2,625 in 4 years, what will ₹24,000 become at the end of 9 years at the same rate of interest, under simple interest?
- If $3x + 2y = 10$ and $2xy = 7$, then find the value of $3x - 2y$ if $3x - 2y > 0$.
⚔️ Practice SSC CGL (Prelims) Maths free + battle 1v1 →